diff --git a/src/accesses/collections/mustBeAdmin.ts b/src/accesses/collections/mustBeAdmin.ts
new file mode 100644
index 0000000..ff533ed
--- /dev/null
+++ b/src/accesses/collections/mustBeAdmin.ts
@@ -0,0 +1,9 @@
+import { Access } from "payload/config";
+import { RecordersRoles } from "../../constants";
+import { Recorder } from "../../types/collections";
+import { isDefined, isUndefined } from "../../utils/asserts";
+
+export const mustBeAdmin: Access<unknown, Recorder> = ({ req: { user } }): boolean => {
+  if (isUndefined(user)) return false;
+  return isDefined(user.role) && user.role.includes(RecordersRoles.Admin);
+};
diff --git a/src/accesses/collections/mustBeAdminOrSelf.ts b/src/accesses/collections/mustBeAdminOrSelf.ts
index 8fb7f38..fd27cfa 100644
--- a/src/accesses/collections/mustBeAdminOrSelf.ts
+++ b/src/accesses/collections/mustBeAdminOrSelf.ts
@@ -1,11 +1,10 @@
 import { Access } from "payload/config";
-import { Recorder } from "../../types/collections";
 import { RecordersRoles } from "../../constants";
+import { Recorder } from "../../types/collections";
 import { isUndefined } from "../../utils/asserts";
 
-export const mustBeAdminOrSelf: Access = ({ req }) => {
-  const user = req.user as Recorder | undefined;
+export const mustBeAdminOrSelf: Access<unknown, Recorder> = ({ req: { user } }) => {
   if (isUndefined(user)) return false;
-  if (user.role.includes(RecordersRoles.Admin)) return true;
+  if (user.role?.includes(RecordersRoles.Admin)) return true;
   return { id: { equals: user.id } };
 };
diff --git a/src/accesses/collections/mustHaveAtLeastOneRole.ts b/src/accesses/collections/mustHaveAtLeastOneRole.ts
index 6e07c86..5dbfe7b 100644
--- a/src/accesses/collections/mustHaveAtLeastOneRole.ts
+++ b/src/accesses/collections/mustHaveAtLeastOneRole.ts
@@ -1,8 +1,8 @@
+import { Access } from "payload/config";
 import { Recorder } from "../../types/collections";
-import { isUndefined } from "../../utils/asserts";
+import { isDefined, isUndefined } from "../../utils/asserts";
 
-export const mustHaveAtLeastOneRole = ({ req }): boolean => {
-  const user = req.user as Recorder | undefined;
+export const mustHaveAtLeastOneRole: Access<unknown, Recorder> = ({ req: { user } }): boolean => {
   if (isUndefined(user)) return false;
-  return user.role.length > 0;
+  return isDefined(user.role) && user.role.length > 0;
 };
diff --git a/src/accesses/fields/mustBeAdmin.ts b/src/accesses/fields/mustBeAdmin.ts
new file mode 100644
index 0000000..1c3c34b
--- /dev/null
+++ b/src/accesses/fields/mustBeAdmin.ts
@@ -0,0 +1,9 @@
+import { FieldAccess } from "payload/types";
+import { RecordersRoles } from "../../constants";
+import { Recorder } from "../../types/collections";
+import { isDefined, isUndefined } from "../../utils/asserts";
+
+export const mustBeAdmin: FieldAccess<any, any, Recorder> = ({ req: { user } }): boolean => {
+  if (isUndefined(user)) return false;
+  return isDefined(user.role) && user.role.includes(RecordersRoles.Admin);
+};
diff --git a/src/accesses/mustBeAdmin.ts b/src/accesses/mustBeAdmin.ts
deleted file mode 100644
index 476682f..0000000
--- a/src/accesses/mustBeAdmin.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { Recorder } from "../types/collections";
-import { RecordersRoles } from "../constants";
-import { isUndefined } from "../utils/asserts";
-
-export const mustBeAdmin = ({ req }): boolean => {
-  const user = req.user as Recorder | undefined;
-  if (isUndefined(user)) return false;
-  return user.role.includes(RecordersRoles.Admin);
-};
diff --git a/src/collections/ChronologyEras/ChronologyEras.ts b/src/collections/ChronologyEras/ChronologyEras.ts
index ea02a91..181c464 100644
--- a/src/collections/ChronologyEras/ChronologyEras.ts
+++ b/src/collections/ChronologyEras/ChronologyEras.ts
@@ -1,5 +1,5 @@
 import { CollectionConfig } from "payload/types";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { CollectionGroups, Collections } from "../../constants";
 import { backPropagationField } from "../../fields/backPropagationField/backPropagationField";
 import { slugField } from "../../fields/slugField/slugField";
diff --git a/src/collections/ChronologyEras/endpoints/importFromStrapi.ts b/src/collections/ChronologyEras/endpoints/importFromStrapi.ts
index 8737f88..43c269d 100644
--- a/src/collections/ChronologyEras/endpoints/importFromStrapi.ts
+++ b/src/collections/ChronologyEras/endpoints/importFromStrapi.ts
@@ -1,8 +1,17 @@
 import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { ChronologyEra } from "../../../types/collections";
+import { StrapiLanguage } from "../../../types/strapi";
+import { isUndefined } from "../../../utils/asserts";
 
-export const importFromStrapi = createStrapiImportEndpoint<ChronologyEra>({
+type StrapiChronologyEra = {
+  slug: string;
+  starting_year: number;
+  ending_year: number;
+  title: { title: string; language: StrapiLanguage; description?: string }[];
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<ChronologyEra, StrapiChronologyEra>({
   strapi: {
     collection: "chronology-eras",
     params: {
@@ -15,11 +24,15 @@ export const importFromStrapi = createStrapiImportEndpoint<ChronologyEra>({
       slug,
       startingYear: starting_year,
       endingYear: ending_year,
-      translations: titles.map(({ language, title, description }) => ({
-        language: language.data.attributes.code,
-        title,
-        description,
-      })),
+      translations: titles.map(({ language, title, description }) => {
+        if (isUndefined(language.data))
+          throw new Error("Language is undefined for one of the translations");
+        return {
+          language: language.data?.attributes.code,
+          title,
+          description,
+        };
+      }),
     }),
   },
 });
diff --git a/src/collections/ChronologyEras/hooks/beforeValidateEndingGreaterThanStarting.ts b/src/collections/ChronologyEras/hooks/beforeValidateEndingGreaterThanStarting.ts
index 645f1db..ac61b0c 100644
--- a/src/collections/ChronologyEras/hooks/beforeValidateEndingGreaterThanStarting.ts
+++ b/src/collections/ChronologyEras/hooks/beforeValidateEndingGreaterThanStarting.ts
@@ -1,9 +1,14 @@
 import { CollectionBeforeValidateHook } from "payload/types";
 import { ChronologyEra } from "../../../types/collections";
+import { isUndefined } from "../../../utils/asserts";
 
 export const beforeValidateEndingGreaterThanStarting: CollectionBeforeValidateHook<
   ChronologyEra
-> = async ({ data: { startingYear, endingYear } }) => {
+> = async ({ data }) => {
+  if (isUndefined(data)) throw new Error("The data is undefined");
+  const { startingYear, endingYear } = data;
+  if (isUndefined(endingYear)) throw new Error("Ending year is undefined");
+  if (isUndefined(startingYear)) throw new Error("Starting year is undefined");
   if (endingYear < startingYear) {
     throw new Error("The ending year cannot be before the starting year.");
   }
diff --git a/src/collections/ChronologyEras/hooks/beforeValidateNoIntersection.ts b/src/collections/ChronologyEras/hooks/beforeValidateNoIntersection.ts
index 09917d1..6b2da27 100644
--- a/src/collections/ChronologyEras/hooks/beforeValidateNoIntersection.ts
+++ b/src/collections/ChronologyEras/hooks/beforeValidateNoIntersection.ts
@@ -2,11 +2,16 @@ import payload from "payload";
 import { CollectionBeforeValidateHook } from "payload/types";
 import { Collections } from "../../../constants";
 import { ChronologyEra } from "../../../types/collections";
-import { hasIntersection } from "../../../utils/asserts";
+import { hasIntersection, isUndefined } from "../../../utils/asserts";
 
 export const beforeValidateNoIntersection: CollectionBeforeValidateHook<ChronologyEra> = async ({
-  data: { startingYear, endingYear },
+  data,
 }) => {
+  if (isUndefined(data)) throw new Error("The data is undefined");
+  const { startingYear, endingYear } = data;
+  if (isUndefined(endingYear)) throw new Error("Ending year is undefined");
+  if (isUndefined(startingYear)) throw new Error("Starting year is undefined");
+
   const otherEras = await payload.find({
     collection: Collections.ChronologyEras,
     limit: 100,
diff --git a/src/collections/ChronologyItems/ChronologyItems.ts b/src/collections/ChronologyItems/ChronologyItems.ts
index d9f2cd6..b4f7f4f 100644
--- a/src/collections/ChronologyItems/ChronologyItems.ts
+++ b/src/collections/ChronologyItems/ChronologyItems.ts
@@ -72,6 +72,7 @@ export const ChronologyItems: CollectionConfig = buildVersionedCollectionConfig(
         if (!DateTime.fromObject({ year, month, day }).isValid) {
           return `The given date (${stringDate}) is not a valid date.`;
         }
+        return true;
       },
       fields: [
         {
diff --git a/src/collections/ChronologyItems/endpoints/importFromStrapi.ts b/src/collections/ChronologyItems/endpoints/importFromStrapi.ts
index a977d36..025de6b 100644
--- a/src/collections/ChronologyItems/endpoints/importFromStrapi.ts
+++ b/src/collections/ChronologyItems/endpoints/importFromStrapi.ts
@@ -1,8 +1,24 @@
 import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { ChronologyItem } from "../../../types/collections";
+import { StrapiLanguage } from "../../../types/strapi";
+import { isUndefined } from "../../../utils/asserts";
 
-export const importFromStrapi = createStrapiImportEndpoint<ChronologyItem>({
+type StrapiChronologyItem = {
+  year: number;
+  month?: number;
+  day?: number;
+  events: {
+    translations: {
+      title?: string;
+      description?: string;
+      note?: string;
+      language: StrapiLanguage;
+    }[];
+  }[];
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<ChronologyItem, StrapiChronologyItem>({
   strapi: {
     collection: "chronology-items",
     params: {
@@ -14,16 +30,20 @@ export const importFromStrapi = createStrapiImportEndpoint<ChronologyItem>({
     convert: ({ year, month, day, events }, user) => ({
       date: { year, month, day },
       events: events.map((event) => ({
-        translations: event.translations.map(({ title, description, note, language }) => ({
-          title,
-          description,
-          note,
-          language: language.data.attributes.code,
-          sourceLanguage: "en",
-          ...(language.data.attributes.code === "en"
-            ? { transcribers: [user.id] }
-            : { translators: [user.id] }),
-        })),
+        translations: event.translations.map(({ title, description, note, language }) => {
+          if (isUndefined(language.data))
+            throw new Error("A language is required for a chronology item event translation");
+          return {
+            title,
+            description,
+            note,
+            language: language.data.attributes.code,
+            sourceLanguage: "en",
+            ...(language.data.attributes.code === "en"
+              ? { transcribers: [user.id] }
+              : { translators: [user.id] }),
+          };
+        }),
       })),
     }),
   },
diff --git a/src/collections/ChronologyItems/hooks/beforeValidatePopulateNameField.ts b/src/collections/ChronologyItems/hooks/beforeValidatePopulateNameField.ts
index 6121ed2..e638019 100644
--- a/src/collections/ChronologyItems/hooks/beforeValidatePopulateNameField.ts
+++ b/src/collections/ChronologyItems/hooks/beforeValidatePopulateNameField.ts
@@ -6,8 +6,12 @@ export const beforeValidatePopulateNameField: FieldHook<
   ChronologyItem,
   ChronologyItem["name"],
   ChronologyItem
-> = ({ data: { date } }) => {
-  if (isUndefined(date?.year)) return "????-??-??";
+> = ({ data }) => {
+  if (isUndefined(data)) {
+    return "????-??-??";
+  }
+  const { date } = data;
+  if (isUndefined(date) || isUndefined(date?.year)) return "????-??-??";
   const { year, month, day } = date;
   let result = String(year).padStart(5, " ");
   if (isDefined(month)) {
diff --git a/src/collections/Currencies/Currencies.ts b/src/collections/Currencies/Currencies.ts
index 30030d7..12db66e 100644
--- a/src/collections/Currencies/Currencies.ts
+++ b/src/collections/Currencies/Currencies.ts
@@ -1,5 +1,5 @@
 import { text } from "payload/dist/fields/validations";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { CollectionGroups, Collections } from "../../constants";
 import { buildCollectionConfig } from "../../utils/collectionConfig";
 import { importFromStrapi } from "./endpoints/importFromStrapi";
diff --git a/src/collections/Currencies/endpoints/importFromStrapi.ts b/src/collections/Currencies/endpoints/importFromStrapi.ts
index d488070..8727102 100644
--- a/src/collections/Currencies/endpoints/importFromStrapi.ts
+++ b/src/collections/Currencies/endpoints/importFromStrapi.ts
@@ -2,7 +2,12 @@ import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { Language } from "../../../types/collections";
 
-export const importFromStrapi = createStrapiImportEndpoint<Language>({
+type StrapiLanguage = {
+  code: string;
+  name: string;
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<Language, StrapiLanguage>({
   strapi: {
     collection: "currencies",
     params: {},
diff --git a/src/collections/Keys/Keys.ts b/src/collections/Keys/Keys.ts
index 6060e1a..72e4268 100644
--- a/src/collections/Keys/Keys.ts
+++ b/src/collections/Keys/Keys.ts
@@ -1,11 +1,11 @@
 import payload from "payload";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { QuickFilters } from "../../components/QuickFilters";
 import { CollectionGroups, Collections, KeysTypes, LanguageCodes } from "../../constants";
 import { translatedFields } from "../../fields/translatedFields/translatedFields";
 import { beforeDuplicateAddCopyTo } from "../../hooks/beforeDuplicateAddCopyTo";
 import { Key } from "../../types/collections";
-import { isDefined } from "../../utils/asserts";
+import { isDefined, isUndefined } from "../../utils/asserts";
 import { buildCollectionConfig } from "../../utils/collectionConfig";
 import { importFromStrapi } from "./endpoints/importFromStrapi";
 
@@ -58,15 +58,15 @@ export const Keys = buildCollectionConfig({
   },
   hooks: {
     beforeValidate: [
-      async ({ data: { name, type } }) => {
+      async ({ data }) => {
+        if (isUndefined(data)) return;
+        const { name, type } = data;
         const result = await payload.find({
           collection: Collections.Keys,
           where: { name: { equals: name }, type: { equals: type } },
         });
         if (result.docs.length > 0) {
-          throw new Error(
-            `A Key of type "${KeysTypes[type]}" already exists with the name "${name}"`
-          );
+          throw new Error(`A Key of type "${type}" already exists with the name "${name}"`);
         }
       },
     ],
diff --git a/src/collections/Keys/endpoints/importFromStrapi.ts b/src/collections/Keys/endpoints/importFromStrapi.ts
index b08556a..5fbac7a 100644
--- a/src/collections/Keys/endpoints/importFromStrapi.ts
+++ b/src/collections/Keys/endpoints/importFromStrapi.ts
@@ -1,14 +1,14 @@
 import payload from "payload";
-import { CollectionConfig } from "payload/types";
 import { Collections } from "../../../constants";
 import {
   getAllStrapiEntries,
   importStrapiEntries,
 } from "../../../endpoints/createStrapiImportEndpoint";
 import { Key } from "../../../types/collections";
-import { isDefined } from "../../../utils/asserts";
+import { CollectionEndpoint, PayloadCreateData } from "../../../types/payload";
+import { StrapiLanguage } from "../../../types/strapi";
+import { isDefined, isUndefined } from "../../../utils/asserts";
 import { formatToCamelCase } from "../../../utils/string";
-import { PayloadCreateData } from "../../../utils/types";
 
 const importStrapiWordings: typeof importStrapiEntries = async ({
   payload: payloadParams,
@@ -30,7 +30,7 @@ const importStrapiWordings: typeof importStrapiEntries = async ({
       .filter(({ name }) => isDefined(name) && name !== ""),
   }));
 
-  const errors = [];
+  const errors: string[] = [];
 
   await Promise.all(
     entries.map(async (entry) => {
@@ -42,7 +42,9 @@ const importStrapiWordings: typeof importStrapiEntries = async ({
         });
       } catch (e) {
         console.warn(e);
-        errors.push(`${e.name} with ${entry.name}`);
+        if (typeof e === "object" && isDefined(e) && "name" in e) {
+          errors.push(`${e.name} with ${entry.name}`);
+        }
       }
     })
   );
@@ -50,7 +52,7 @@ const importStrapiWordings: typeof importStrapiEntries = async ({
   return { count: entries.length, errors };
 };
 
-export const importFromStrapi: CollectionConfig["endpoints"][number] = {
+export const importFromStrapi: CollectionEndpoint = {
   method: "get",
   path: "/strapi",
   handler: async (req, res) => {
@@ -64,7 +66,15 @@ export const importFromStrapi: CollectionConfig["endpoints"][number] = {
       });
     }
 
-    const { count: categoriesCount, errors: categoriesErrors } = await importStrapiEntries<Key>({
+    type StrapiCategories = {
+      slug: string;
+      titles: { title?: string; short?: string; language: StrapiLanguage }[];
+    };
+
+    const { count: categoriesCount, errors: categoriesErrors } = await importStrapiEntries<
+      Key,
+      StrapiCategories
+    >({
       strapi: {
         collection: "categories",
         params: { populate: { titles: { populate: "language" } } },
@@ -74,59 +84,96 @@ export const importFromStrapi: CollectionConfig["endpoints"][number] = {
         convert: ({ slug, titles }) => ({
           name: slug,
           type: "Categories",
-          translations: titles.map(({ title, short, language }) => ({
-            name: title,
-            short,
-            language: language.data.attributes.code,
-          })),
+          translations: titles.map(({ title, short, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            if (isUndefined(title))
+              throw new Error("A title is required for a Keys title translation");
+            return {
+              name: title,
+              short,
+              language: language.data.attributes.code,
+            };
+          }),
         }),
       },
       user: req.user,
     });
 
-    const { count: contentTypesCount, errors: contentTypesErrors } = await importStrapiEntries<Key>(
-      {
-        strapi: {
-          collection: "content-types",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "Contents",
-            translations: titles.map(({ title, language }) => ({
+    type StrapiContentType = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: contentTypesCount, errors: contentTypesErrors } = await importStrapiEntries<
+      Key,
+      StrapiContentType
+    >({
+      strapi: {
+        collection: "content-types",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "Contents",
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
               name: title,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      }
-    );
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: gamePlatformsCount, errors: gamePlatformsErrors } =
-      await importStrapiEntries<Key>({
-        strapi: {
-          collection: "game-platforms",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "GamePlatforms",
-            translations: titles.map(({ title, short, language }) => ({
+    type StrapiGamePlatform = {
+      slug: string;
+      titles: { title?: string; short?: string; language: StrapiLanguage }[];
+    };
+
+    const { count: gamePlatformsCount, errors: gamePlatformsErrors } = await importStrapiEntries<
+      Key,
+      StrapiGamePlatform
+    >({
+      strapi: {
+        collection: "game-platforms",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "GamePlatforms",
+          translations: titles.map(({ title, short, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            if (isUndefined(title))
+              throw new Error("A title is required for a Keys title translation");
+            return {
               name: title,
               short,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      });
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: libraryCount, errors: libraryErrors } = await importStrapiEntries<Key>({
+    type StrapiMetadataTypes = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: libraryCount, errors: libraryErrors } = await importStrapiEntries<
+      Key,
+      StrapiMetadataTypes
+    >({
       strapi: {
         collection: "metadata-types",
         params: { populate: { titles: { populate: "language" } } },
@@ -136,99 +183,152 @@ export const importFromStrapi: CollectionConfig["endpoints"][number] = {
         convert: ({ slug, titles }) => ({
           name: slug,
           type: "Library",
-          translations: titles.map(({ title, language }) => ({
-            name: title,
-            language: language.data.attributes.code,
-          })),
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
+              name: title,
+              language: language.data.attributes.code,
+            };
+          }),
         }),
       },
       user: req.user,
     });
 
-    const { count: libraryAudioCount, errors: libraryAudioErrors } = await importStrapiEntries<Key>(
-      {
-        strapi: {
-          collection: "audio-subtypes",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "LibraryAudio",
-            translations: titles.map(({ title, language }) => ({
+    type StrapiAudioSubtypes = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: libraryAudioCount, errors: libraryAudioErrors } = await importStrapiEntries<
+      Key,
+      StrapiAudioSubtypes
+    >({
+      strapi: {
+        collection: "audio-subtypes",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "LibraryAudio",
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
               name: title,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      }
-    );
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: libraryGroupCount, errors: libraryGroupErrors } = await importStrapiEntries<Key>(
-      {
-        strapi: {
-          collection: "group-subtypes",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "LibraryGroup",
-            translations: titles.map(({ title, language }) => ({
+    type StrapiGroupSubtypes = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: libraryGroupCount, errors: libraryGroupErrors } = await importStrapiEntries<
+      Key,
+      StrapiGroupSubtypes
+    >({
+      strapi: {
+        collection: "group-subtypes",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "LibraryGroup",
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
               name: title,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      }
-    );
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: libraryTextualCount, errors: libraryTextualErrors } =
-      await importStrapiEntries<Key>({
-        strapi: {
-          collection: "textual-subtypes",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "LibraryTextual",
-            translations: titles.map(({ title, language }) => ({
+    type StrapiTextualSubtypes = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: libraryTextualCount, errors: libraryTextualErrors } = await importStrapiEntries<
+      Key,
+      StrapiTextualSubtypes
+    >({
+      strapi: {
+        collection: "textual-subtypes",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "LibraryTextual",
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
               name: title,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      });
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: libraryVideoCount, errors: libraryVideoErrors } = await importStrapiEntries<Key>(
-      {
-        strapi: {
-          collection: "video-subtypes",
-          params: { populate: { titles: { populate: "language" } } },
-        },
-        payload: {
-          collection: Collections.Keys,
-          convert: ({ slug, titles }) => ({
-            name: slug,
-            type: "LibraryVideo",
-            translations: titles.map(({ title, language }) => ({
+    type StrapiVideoSubtypes = {
+      slug: string;
+      titles: { title: string; language: StrapiLanguage }[];
+    };
+
+    const { count: libraryVideoCount, errors: libraryVideoErrors } = await importStrapiEntries<
+      Key,
+      StrapiVideoSubtypes
+    >({
+      strapi: {
+        collection: "video-subtypes",
+        params: { populate: { titles: { populate: "language" } } },
+      },
+      payload: {
+        collection: Collections.Keys,
+        convert: ({ slug, titles }) => ({
+          name: slug,
+          type: "LibraryVideo",
+          translations: titles.map(({ title, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            return {
               name: title,
               language: language.data.attributes.code,
-            })),
+            };
           }),
-        },
-        user: req.user,
-      }
-    );
+        }),
+      },
+      user: req.user,
+    });
 
-    const { count: weaponsCount, errors: weaponsErrors } = await importStrapiEntries<Key>({
+    type StrapiWeaponTypes = {
+      slug: string;
+      translations: { name?: string; language: StrapiLanguage }[];
+    };
+
+    const { count: weaponsCount, errors: weaponsErrors } = await importStrapiEntries<
+      Key,
+      StrapiWeaponTypes
+    >({
       strapi: {
         collection: "weapon-story-types",
         params: { populate: { translations: { populate: "language" } } },
@@ -238,16 +338,22 @@ export const importFromStrapi: CollectionConfig["endpoints"][number] = {
         convert: ({ slug, translations }) => ({
           name: slug,
           type: "Weapons",
-          translations: translations.map(({ name, language }) => ({
-            name,
-            language: language.data.attributes.code,
-          })),
+          translations: translations.map(({ name, language }) => {
+            if (isUndefined(language.data))
+              throw new Error("A language is required for a Keys title translation");
+            if (isUndefined(name))
+              throw new Error("A name is required for a Keys title translation");
+            return {
+              name,
+              language: language.data.attributes.code,
+            };
+          }),
         }),
       },
       user: req.user,
     });
 
-    const { count: wordingsCount, errors: wordingsErrors } = await importStrapiWordings({
+    const { count: wordingsCount, errors: wordingsErrors } = await importStrapiWordings<Key, Key>({
       strapi: { collection: "website-interfaces", params: { populate: "ui_language" } },
       payload: { collection: Collections.Keys, convert: (strapiObject) => strapiObject },
       user: req.user,
diff --git a/src/collections/Languages/Languages.ts b/src/collections/Languages/Languages.ts
index 06c9d2f..7371120 100644
--- a/src/collections/Languages/Languages.ts
+++ b/src/collections/Languages/Languages.ts
@@ -1,5 +1,5 @@
 import { text } from "payload/dist/fields/validations";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { publicAccess } from "../../accesses/publicAccess";
 import { CollectionGroups, Collections } from "../../constants";
 import { buildCollectionConfig } from "../../utils/collectionConfig";
diff --git a/src/collections/Languages/endpoints/importFromStrapi.ts b/src/collections/Languages/endpoints/importFromStrapi.ts
index 0864fba..ac8a934 100644
--- a/src/collections/Languages/endpoints/importFromStrapi.ts
+++ b/src/collections/Languages/endpoints/importFromStrapi.ts
@@ -2,7 +2,12 @@ import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { Language } from "../../../types/collections";
 
-export const importFromStrapi = createStrapiImportEndpoint<Language>({
+type StrapiLanguage = {
+  name: string;
+  code: string;
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<Language, StrapiLanguage>({
   strapi: {
     collection: "languages",
     params: {},
diff --git a/src/collections/LibraryItems/LibraryItems.ts b/src/collections/LibraryItems/LibraryItems.ts
index 331a4ec..e73024c 100644
--- a/src/collections/LibraryItems/LibraryItems.ts
+++ b/src/collections/LibraryItems/LibraryItems.ts
@@ -1,3 +1,4 @@
+import { RowLabelArgs } from "payload/dist/admin/components/forms/RowLabel/types";
 import {
   CollectionGroups,
   Collections,
@@ -18,7 +19,6 @@ import { LibraryItem } from "../../types/collections";
 import { isDefined } from "../../utils/asserts";
 import { buildVersionedCollectionConfig } from "../../utils/versionedCollectionConfig";
 import { RowLabel } from "./components/RowLabel";
-import { getBySlug } from "./endpoints/getBySlug";
 
 const fields = {
   status: "_status",
@@ -139,7 +139,6 @@ export const LibraryItems = buildVersionedCollectionConfig({
     },
     preview: (doc) => `https://accords-library.com/library/${doc.slug}`,
   },
-  endpoints: [getBySlug],
   fields: [
     {
       name: fields.itemType,
@@ -480,7 +479,7 @@ export const LibraryItems = buildVersionedCollectionConfig({
                       "Make sure the page number corresponds to the page number written on \
                   the scan. You can use negative page numbers if necessary.",
                     components: {
-                      RowLabel: ({ data }) => RowLabel(data),
+                      RowLabel: ({ data }: RowLabelArgs) => RowLabel(data),
                     },
                   },
                   fields: [
diff --git a/src/collections/LibraryItems/endpoints/getBySlug.ts b/src/collections/LibraryItems/endpoints/getBySlug.ts
deleted file mode 100644
index b540b33..0000000
--- a/src/collections/LibraryItems/endpoints/getBySlug.ts
+++ /dev/null
@@ -1,59 +0,0 @@
-import cleanDeep from "clean-deep";
-import { Collections } from "../../../constants";
-import { createGetByEndpoint } from "../../../endpoints/createByEndpoint";
-import { LibraryItem } from "../../../types/collections";
-
-type ProcessedLibraryItem = Omit<LibraryItem, "size" | "price" | "scans" | "id"> & {
-  size?: Omit<LibraryItem["size"][number], "id">;
-  price?: Omit<LibraryItem["price"][number], "id" | "currency"> & { currency: string };
-  scans?: Omit<LibraryItem["scans"][number], "id" | "obi" | "cover" | "dustjacket"> & {
-    obi: Omit<LibraryItem["scans"][number]["obi"][number], "id">;
-    cover: Omit<LibraryItem["scans"][number]["obi"][number], "id">;
-    dustjacket: Omit<LibraryItem["scans"][number]["obi"][number], "id">;
-  };
-};
-
-export const getBySlug = createGetByEndpoint<LibraryItem, Partial<ProcessedLibraryItem>>(
-  Collections.LibraryItems,
-  "slug",
-  async ({ id, size, price, scans, ...otherProps }) => {
-    const processedLibraryItem: ProcessedLibraryItem = {
-      size: processOptionalGroup(size),
-      price: processPrice(price),
-      scans: processScans(scans),
-      ...otherProps,
-    };
-
-    return cleanDeep(processedLibraryItem, {
-      emptyStrings: false,
-      emptyArrays: false,
-      emptyObjects: false,
-      nullValues: true,
-      undefinedValues: true,
-      NaNValues: false,
-    });
-  }
-);
-
-const processScans = (scans: LibraryItem["scans"]): ProcessedLibraryItem["scans"] => {
-  if (!scans || scans.length === 0) return undefined;
-  const { cover, dustjacket, id, obi, ...otherProps } = scans[0];
-  return {
-    cover: processOptionalGroup(cover),
-    dustjacket: processOptionalGroup(dustjacket),
-    obi: processOptionalGroup(obi),
-    ...otherProps,
-  };
-};
-
-const processPrice = (price: LibraryItem["price"]): ProcessedLibraryItem["price"] => {
-  if (!price || price.length === 0) return undefined;
-  const { currency, ...otherProps } = processOptionalGroup(price);
-  return { ...otherProps, currency: typeof currency === "string" ? currency : currency.id };
-};
-
-const processOptionalGroup = <T extends { id?: string }>(group: T[] | null | undefined) => {
-  if (!group || group.length === 0) return undefined;
-  const { id, ...otherProps } = group[0];
-  return otherProps;
-};
diff --git a/src/collections/Posts/Posts.ts b/src/collections/Posts/Posts.ts
index 94fced0..58e7c85 100644
--- a/src/collections/Posts/Posts.ts
+++ b/src/collections/Posts/Posts.ts
@@ -8,7 +8,6 @@ import { beforeDuplicatePiping } from "../../hooks/beforeDuplicatePiping";
 import { beforeDuplicateUnpublish } from "../../hooks/beforeDuplicateUnpublish";
 import { isDefined, isUndefined } from "../../utils/asserts";
 import { buildVersionedCollectionConfig } from "../../utils/versionedCollectionConfig";
-import { removeTranslatorsForTranscripts } from "./hooks/beforeValidate";
 
 const fields = {
   slug: "slug",
@@ -57,9 +56,6 @@ export const Posts = buildVersionedCollectionConfig({
     },
     preview: (doc) => `https://accords-library.com/news/${doc.slug}`,
   },
-  hooks: {
-    beforeValidate: [removeTranslatorsForTranscripts],
-  },
   fields: [
     {
       type: "row",
@@ -110,6 +106,15 @@ export const Posts = buildVersionedCollectionConfig({
               type: "relationship",
               relationTo: Collections.Recorders,
               hasMany: true,
+              hooks: {
+                beforeChange: [
+                  ({ siblingData }) => {
+                    if (siblingData.language === siblingData.sourceLanguage) {
+                      delete siblingData.translators;
+                    }
+                  },
+                ],
+              },
               admin: {
                 condition: (_, siblingData) => {
                   if (
diff --git a/src/collections/Posts/hooks/beforeValidate.ts b/src/collections/Posts/hooks/beforeValidate.ts
deleted file mode 100644
index 9a6d1d9..0000000
--- a/src/collections/Posts/hooks/beforeValidate.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { CollectionBeforeValidateHook } from "payload/types";
-import { Post } from "../../../types/collections";
-
-export const removeTranslatorsForTranscripts: CollectionBeforeValidateHook<Post> = async ({
-  data: { translations, ...data },
-}) => ({
-  ...data,
-  translations: translations?.map(({ translators, ...translation }) => {
-    if (translation.language === translation.sourceLanguage) {
-      return { ...translation, translators: [] };
-    }
-    return { ...translation, translators };
-  }),
-});
diff --git a/src/collections/Recorders/Recorders.ts b/src/collections/Recorders/Recorders.ts
index 8e97dc2..9a08b9d 100644
--- a/src/collections/Recorders/Recorders.ts
+++ b/src/collections/Recorders/Recorders.ts
@@ -1,5 +1,6 @@
+import { mustBeAdmin as mustBeAdminForCollections } from "../../accesses/collections/mustBeAdmin";
 import { mustBeAdminOrSelf } from "../../accesses/collections/mustBeAdminOrSelf";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin as mustBeAdminForFields } from "../../accesses/fields/mustBeAdmin";
 import { QuickFilters } from "../../components/QuickFilters";
 import { CollectionGroups, Collections, RecordersRoles } from "../../constants";
 import { imageField } from "../../fields/imageField/imageField";
@@ -55,7 +56,6 @@ export const Recorders = buildCollectionConfig({
                   label: "∅ Role",
                   filter: { where: { role: { not_in: Object.keys(RecordersRoles).join(",") } } },
                 },
-                ,
               ],
               [{ label: "Anonymized", filter: { where: { anonymize: { equals: true } } } }],
             ],
@@ -65,10 +65,10 @@ export const Recorders = buildCollectionConfig({
   },
   auth: true,
   access: {
-    unlock: mustBeAdmin,
+    unlock: mustBeAdminForCollections,
     update: mustBeAdminOrSelf,
-    delete: mustBeAdmin,
-    create: mustBeAdmin,
+    delete: mustBeAdminForCollections,
+    create: mustBeAdminForCollections,
   },
   hooks: {
     beforeLogin: [beforeLoginMustHaveAtLeastOneRole],
@@ -111,14 +111,14 @@ export const Recorders = buildCollectionConfig({
         description:
           "A short personal description about you or your involvement with this project or the franchise",
       },
-      fields: [{ name: fields.biography, type: "textarea" }],
+      fields: [{ name: fields.biography, required: true, type: "textarea" }],
     }),
     {
       name: fields.role,
       type: "select",
       access: {
-        update: mustBeAdmin,
-        create: mustBeAdmin,
+        update: mustBeAdminForFields,
+        create: mustBeAdminForFields,
       },
       hasMany: true,
       options: Object.entries(RecordersRoles).map(([value, label]) => ({
diff --git a/src/collections/Recorders/endpoints/importFromStrapi.ts b/src/collections/Recorders/endpoints/importFromStrapi.ts
index 96c7fcb..c445045 100644
--- a/src/collections/Recorders/endpoints/importFromStrapi.ts
+++ b/src/collections/Recorders/endpoints/importFromStrapi.ts
@@ -2,10 +2,21 @@ import payload from "payload";
 import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { Recorder } from "../../../types/collections";
+import { PayloadCreateData } from "../../../types/payload";
+import { StrapiImage, StrapiLanguage } from "../../../types/strapi";
+import { isUndefined } from "../../../utils/asserts";
 import { uploadStrapiImage } from "../../../utils/localApi";
-import { PayloadCreateData } from "../../../utils/types";
 
-export const importFromStrapi = createStrapiImportEndpoint<Recorder>({
+type StrapiRecorder = {
+  username: string;
+  anonymize: boolean;
+  anonymous_code: number;
+  languages: { data: { attributes: { code: string } }[] };
+  avatar: StrapiImage;
+  bio: { language: StrapiLanguage; bio?: string }[];
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<Recorder, StrapiRecorder>({
   strapi: {
     collection: "recorders",
     params: {
@@ -27,10 +38,15 @@ export const importFromStrapi = createStrapiImportEndpoint<Recorder>({
         anonymize,
         languages: languages.data?.map((language) => language.attributes.code),
         avatar: avatarId,
-        biographies: bios?.map(({ language, bio }) => ({
-          language: language.data.attributes.code,
-          biography: bio,
-        })),
+        biographies: bios?.map(({ language, bio }) => {
+          if (isUndefined(language.data))
+            throw new Error("A language is required for a Recorder biography");
+          if (isUndefined(bio)) throw new Error("A bio is required for a Recorder biography");
+          return {
+            language: language.data.attributes.code,
+            biography: bio,
+          };
+        }),
       };
 
       await payload.create({ collection: Collections.Recorders, data, user });
diff --git a/src/collections/Videos/Videos.ts b/src/collections/Videos/Videos.ts
index 7800ff7..16a165e 100644
--- a/src/collections/Videos/Videos.ts
+++ b/src/collections/Videos/Videos.ts
@@ -1,5 +1,5 @@
 import { CollectionConfig } from "payload/types";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { CollectionGroups, Collections, VideoSources } from "../../constants";
 import { buildCollectionConfig } from "../../utils/collectionConfig";
 import { importFromStrapi } from "./endpoints/importFromStrapi";
diff --git a/src/collections/Videos/endpoints/importFromStrapi.ts b/src/collections/Videos/endpoints/importFromStrapi.ts
index 13b073f..9485a38 100644
--- a/src/collections/Videos/endpoints/importFromStrapi.ts
+++ b/src/collections/Videos/endpoints/importFromStrapi.ts
@@ -2,9 +2,26 @@ import payload from "payload";
 import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { Video, VideosChannel } from "../../../types/collections";
-import { PayloadCreateData } from "../../../utils/types";
+import { PayloadCreateData } from "../../../types/payload";
+import { isUndefined } from "../../../utils/asserts";
 
-export const importFromStrapi = createStrapiImportEndpoint<Video>({
+type StapiVideo = {
+  uid: string;
+  title: string;
+  description: string;
+  published_date: {
+    year?: number;
+    month?: number;
+    day?: number;
+  };
+  views: number;
+  likes: number;
+  source?: "YouTube" | "NicoNico" | "Tumblr";
+  gone: boolean;
+  channel: { data?: { attributes: { uid: string; title: string; subscribers: number } } };
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<Video, StapiVideo>({
   strapi: {
     collection: "videos",
     params: { populate: "published_date,channel" },
@@ -25,6 +42,9 @@ export const importFromStrapi = createStrapiImportEndpoint<Video>({
       },
       user
     ) => {
+      if (isUndefined(source)) throw new Error("A source is required to create a Video");
+      if (isUndefined(channel.data)) throw new Error("A channel is required to create a Video");
+
       try {
         const videoChannel: PayloadCreateData<VideosChannel> = {
           uid: channel.data.attributes.uid,
diff --git a/src/collections/VideosChannels/VideosChannels.ts b/src/collections/VideosChannels/VideosChannels.ts
index 471dc2a..69447b5 100644
--- a/src/collections/VideosChannels/VideosChannels.ts
+++ b/src/collections/VideosChannels/VideosChannels.ts
@@ -1,5 +1,5 @@
 import { CollectionConfig } from "payload/types";
-import { mustBeAdmin } from "../../accesses/mustBeAdmin";
+import { mustBeAdmin } from "../../accesses/collections/mustBeAdmin";
 import { CollectionGroups, Collections } from "../../constants";
 import { buildCollectionConfig } from "../../utils/collectionConfig";
 import { importFromStrapi } from "./endpoints/importFromStrapi";
diff --git a/src/collections/VideosChannels/endpoints/importFromStrapi.ts b/src/collections/VideosChannels/endpoints/importFromStrapi.ts
index 9ff6ae3..1d8394f 100644
--- a/src/collections/VideosChannels/endpoints/importFromStrapi.ts
+++ b/src/collections/VideosChannels/endpoints/importFromStrapi.ts
@@ -2,7 +2,13 @@ import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { VideosChannel } from "../../../types/collections";
 
-export const importFromStrapi = createStrapiImportEndpoint<VideosChannel>({
+type StrapiVideoChannel = {
+  uid: string;
+  title: string;
+  subscribers: number;
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<VideosChannel, StrapiVideoChannel>({
   strapi: {
     collection: "video-channels",
     params: {},
diff --git a/src/collections/Weapons/Weapons.ts b/src/collections/Weapons/Weapons.ts
index 601cf23..6bc278c 100644
--- a/src/collections/Weapons/Weapons.ts
+++ b/src/collections/Weapons/Weapons.ts
@@ -1,3 +1,4 @@
+import { RowLabelArgs } from "payload/dist/admin/components/forms/RowLabel/types";
 import { CollectionGroups, Collections, KeysTypes } from "../../constants";
 import { imageField } from "../../fields/imageField/imageField";
 import { keysField } from "../../fields/keysField/keysField";
@@ -78,7 +79,7 @@ export const Weapons = buildVersionedCollectionConfig({
       admin: {
         initCollapsed: true,
         components: {
-          RowLabel: ({ data }) =>
+          RowLabel: ({ data }: RowLabelArgs) =>
             AppearanceRowLabel({ keyIds: data[fields.appearancesCategories] ?? [] }),
         },
       },
diff --git a/src/collections/Weapons/endpoints/importFromStrapi.ts b/src/collections/Weapons/endpoints/importFromStrapi.ts
index 8a3276b..b431205 100644
--- a/src/collections/Weapons/endpoints/importFromStrapi.ts
+++ b/src/collections/Weapons/endpoints/importFromStrapi.ts
@@ -2,11 +2,31 @@ import payload from "payload";
 import { Collections } from "../../../constants";
 import { createStrapiImportEndpoint } from "../../../endpoints/createStrapiImportEndpoint";
 import { Weapon, WeaponsGroup } from "../../../types/collections";
-import { isDefined } from "../../../utils/asserts";
+import { PayloadCreateData } from "../../../types/payload";
+import { StrapiImage, StrapiLanguage } from "../../../types/strapi";
+import { isDefined, isUndefined } from "../../../utils/asserts";
 import { findCategory, findWeaponType, uploadStrapiImage } from "../../../utils/localApi";
-import { PayloadCreateData } from "../../../utils/types";
 
-export const importFromStrapi = createStrapiImportEndpoint<Weapon>({
+type StrapiWeapon = {
+  slug: string;
+  name: { name: string; language: StrapiLanguage }[];
+  weapon_group: { data?: { attributes: { slug: string } } };
+  thumbnail: StrapiImage;
+  type: { data?: { attributes: { slug: string } } };
+  stories: {
+    categories: { data: { attributes: { slug: string } }[] };
+    translations: {
+      language: StrapiLanguage;
+      description?: string;
+      level_1?: string;
+      level_2?: string;
+      level_3?: string;
+      level_4?: string;
+    }[];
+  }[];
+};
+
+export const importFromStrapi = createStrapiImportEndpoint<Weapon, StrapiWeapon>({
   strapi: {
     collection: "weapon-stories",
     params: {
@@ -23,7 +43,7 @@ export const importFromStrapi = createStrapiImportEndpoint<Weapon>({
   payload: {
     collection: Collections.Weapons,
     import: async ({ slug, type, stories, name: names, weapon_group, thumbnail }, user) => {
-      let groupId: string;
+      let groupId: string | undefined;
       if (isDefined(weapon_group.data)) {
         try {
           const groupData: PayloadCreateData<WeaponsGroup> = {
@@ -51,6 +71,8 @@ export const importFromStrapi = createStrapiImportEndpoint<Weapon>({
         image: thumbnail,
       });
 
+      if (isUndefined(type.data)) throw new Error("A type is required to create a Weapon");
+
       const data: PayloadCreateData<Weapon> = {
         slug,
         type: await findWeaponType(type.data.attributes.slug),
@@ -62,19 +84,26 @@ export const importFromStrapi = createStrapiImportEndpoint<Weapon>({
               categories.data.map(({ attributes }) => findCategory(attributes.slug))
             ),
             translations: translations.map(
-              ({ language, description, level_1, level_2, level_3, level_4 }) => ({
-                language: language.data?.attributes.code,
-                sourceLanguage: language.data?.attributes.code,
-                name: names.find(
+              ({ language, description, level_1, level_2, level_3, level_4 }) => {
+                if (isUndefined(language.data))
+                  throw new Error("A language is required to create a Weapon translation");
+                const name = names.find(
                   (name) => name.language.data?.attributes.code === language.data?.attributes.code
-                )?.name,
-                description,
-                level1: level_1,
-                level2: level_2,
-                level3: level_3,
-                level4: level_4,
-                transcribers: [user.id],
-              })
+                )?.name;
+                if (isUndefined(name))
+                  throw new Error("A name is required to create a Weapon translation");
+                return {
+                  language: language.data?.attributes.code,
+                  sourceLanguage: language.data?.attributes.code,
+                  name,
+                  description,
+                  level1: level_1,
+                  level2: level_2,
+                  level3: level_3,
+                  level4: level_4,
+                  transcribers: [user.id],
+                };
+              }
             ),
           }))
         ),
diff --git a/src/endpoints/createByEndpoint.ts b/src/endpoints/createByEndpoint.ts
index eeee113..038329a 100644
--- a/src/endpoints/createByEndpoint.ts
+++ b/src/endpoints/createByEndpoint.ts
@@ -1,11 +1,11 @@
 import payload from "payload";
-import { CollectionConfig } from "payload/types";
+import { CollectionEndpoint } from "../types/payload";
 
 export const createGetByEndpoint = <T, R>(
   collection: string,
   attribute: string,
   handler: (doc: T) => Promise<R>
-): CollectionConfig["endpoints"][number] => ({
+): CollectionEndpoint => ({
   path: `/${attribute}/:${attribute}`,
   method: "get",
   handler: async (req, res) => {
diff --git a/src/endpoints/createStrapiImportEndpoint.ts b/src/endpoints/createStrapiImportEndpoint.ts
index 5decdcc..ce896d9 100644
--- a/src/endpoints/createStrapiImportEndpoint.ts
+++ b/src/endpoints/createStrapiImportEndpoint.ts
@@ -1,9 +1,8 @@
 import payload from "payload";
-import { CollectionConfig } from "payload/types";
 import QueryString from "qs";
 import { Recorder } from "../types/collections";
+import { CollectionEndpoint, PayloadCreateData } from "../types/payload";
 import { isDefined } from "../utils/asserts";
-import { PayloadCreateData } from "../utils/types";
 
 export const getAllStrapiEntries = async <T>(
   collectionSlug: string,
@@ -31,26 +30,26 @@ export const getAllStrapiEntries = async <T>(
   return result;
 };
 
-type Params<T> = {
+type Params<T, S> = {
   strapi: {
     collection: string;
     params: any;
   };
   payload: {
     collection: string;
-    import?: (strapiObject: any, user: any) => Promise<void>;
-    convert?: (strapiObject: any, user: any) => PayloadCreateData<T>;
+    import?: (strapiObject: S, user: any) => Promise<void>;
+    convert?: (strapiObject: S, user: any) => PayloadCreateData<T>;
   };
 };
 
-export const importStrapiEntries = async <T>({
+export const importStrapiEntries = async <T, S>({
   strapi: strapiParams,
   payload: payloadParams,
   user,
-}: Params<T> & { user: Recorder }) => {
+}: Params<T, S> & { user: Recorder }) => {
   const entries = await getAllStrapiEntries<any>(strapiParams.collection, strapiParams.params);
 
-  const errors = [];
+  const errors: string[] = [];
 
   await Promise.all(
     entries.map(async ({ attributes, id }) => {
@@ -68,7 +67,9 @@ export const importStrapiEntries = async <T>({
         }
       } catch (e) {
         console.warn(e);
-        errors.push(`${e.name} with ${id}`);
+        if (typeof e === "object" && isDefined(e) && "name" in e) {
+          errors.push(`${e.name} with ${id}`);
+        }
       }
     })
   );
@@ -76,9 +77,7 @@ export const importStrapiEntries = async <T>({
   return { count: entries.length, errors };
 };
 
-export const createStrapiImportEndpoint = <T>(
-  params: Params<T>
-): CollectionConfig["endpoints"][number] => ({
+export const createStrapiImportEndpoint = <T, S>(params: Params<T, S>): CollectionEndpoint => ({
   method: "get",
   path: "/strapi",
   handler: async (req, res) => {
diff --git a/src/fields/backPropagationField/backPropagationField.ts b/src/fields/backPropagationField/backPropagationField.ts
index 139355d..0fda52b 100644
--- a/src/fields/backPropagationField/backPropagationField.ts
+++ b/src/fields/backPropagationField/backPropagationField.ts
@@ -30,7 +30,7 @@ export const backPropagationField = ({
     afterRead: [
       ...afterRead,
       async ({ data }) => {
-        if (isNotEmpty(data.id)) {
+        if (isNotEmpty(data?.id)) {
           const result = await payload.find({
             collection: params.relationTo,
             where: where(data),
diff --git a/src/fields/keysField/keysField.ts b/src/fields/keysField/keysField.ts
index 380b33e..17f9dc1 100644
--- a/src/fields/keysField/keysField.ts
+++ b/src/fields/keysField/keysField.ts
@@ -19,5 +19,5 @@ export const keysField = ({
   filterOptions: { type: { equals: getKeysTypesKey(relationTo) } },
 });
 
-const getKeysTypesKey = (keyType: KeysTypes): string =>
-  Object.entries(KeysTypes).find(([, value]) => value === keyType)[0];
+const getKeysTypesKey = (keyType: KeysTypes): string | undefined =>
+  Object.entries(KeysTypes).find(([, value]) => value === keyType)?.[0];
diff --git a/src/fields/translatedFields/translatedFields.ts b/src/fields/translatedFields/translatedFields.ts
index c6821d8..170603c 100644
--- a/src/fields/translatedFields/translatedFields.ts
+++ b/src/fields/translatedFields/translatedFields.ts
@@ -1,3 +1,4 @@
+import { RowLabelArgs } from "payload/dist/admin/components/forms/RowLabel/types";
 import { array } from "payload/dist/fields/validations";
 import { ArrayField, Field } from "payload/types";
 import { Collections } from "../../constants";
@@ -118,6 +119,8 @@ const creditFields: Field = {
   ],
 };
 
+type FieldData = Record<string, any> & { [fieldsNames.language]: string };
+
 export const translatedFields = ({
   fields,
   validate,
@@ -129,7 +132,7 @@ export const translatedFields = ({
   admin: {
     initCollapsed: true,
     components: {
-      Cell: ({ cellData }) =>
+      Cell: ({ cellData }: { cellData: FieldData[] }) =>
         Cell({
           cellData:
             cellData?.map((row) => ({
@@ -137,7 +140,7 @@ export const translatedFields = ({
               title: isDefined(useAsTitle) ? row[useAsTitle] : undefined,
             })) ?? [],
         }),
-      RowLabel: ({ data }) =>
+      RowLabel: ({ data }: RowLabelArgs) =>
         RowLabel({
           language: data[fieldsNames.language],
           title: isDefined(useAsTitle) ? data[useAsTitle] : undefined,
@@ -162,6 +165,8 @@ export const translatedFields = ({
     if (hasDuplicates(languages)) {
       return `There cannot be multiple ${otherProps.name} with the same ${fieldsNames.language}`;
     }
+
+    return true;
   },
   fields: [
     hasSourceLanguage
diff --git a/src/server.ts b/src/server.ts
index f2ec033..c080516 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -4,7 +4,8 @@ import path from "path";
 import payload from "payload";
 import { Collections, RecordersRoles } from "./constants";
 import { Recorder } from "./types/collections";
-import { PayloadCreateData } from "./utils/types";
+import { PayloadCreateData } from "./types/payload";
+import { isDefined, isUndefined } from "./utils/asserts";
 
 const app = express();
 
@@ -15,6 +16,15 @@ app.get("/", (_, res) => {
 
 const start = async () => {
   // Initialize Payload
+
+  if (isUndefined(process.env.PAYLOAD_SECRET)) {
+    throw new Error("Missing required env variable: PAYLOAD_SECRET");
+  }
+
+  if (isUndefined(process.env.MONGODB_URI)) {
+    throw new Error("Missing required env variable: MONGODB_URI");
+  }
+
   await payload.init({
     secret: process.env.PAYLOAD_SECRET,
     mongoURL: process.env.MONGODB_URI,
@@ -24,19 +34,26 @@ const start = async () => {
       const recorders = await payload.find({ collection: Collections.Recorders });
 
       // If no recorders, we seed some initial data
-      if (recorders.docs.length === 0) {
-        payload.logger.info("Seeding some initial data");
-        const recorder: PayloadCreateData<Recorder> = {
-          email: process.env.SEEDING_ADMIN_EMAIL,
-          password: process.env.SEEDING_ADMIN_PASSWORD,
-          username: process.env.SEEDING_ADMIN_USERNAME,
-          role: [RecordersRoles.Admin],
-          anonymize: false,
-        };
-        await payload.create({
-          collection: Collections.Recorders,
-          data: recorder,
-        });
+      if (
+        isDefined(process.env.SEEDING_ADMIN_EMAIL) &&
+        isDefined(process.env.SEEDING_ADMIN_PASSWORD) &&
+        isDefined(process.env.SEEDING_ADMIN_USERNAME)
+      ) {
+        if (recorders.docs.length === 0) {
+          payload.logger.info("Seeding some initial data");
+
+          const recorder: PayloadCreateData<Recorder> = {
+            email: process.env.SEEDING_ADMIN_EMAIL,
+            password: process.env.SEEDING_ADMIN_PASSWORD,
+            username: process.env.SEEDING_ADMIN_USERNAME,
+            role: [RecordersRoles.Admin],
+            anonymize: false,
+          };
+          await payload.create({
+            collection: Collections.Recorders,
+            data: recorder,
+          });
+        }
       }
     },
   });
diff --git a/src/types/collections.ts b/src/types/collections.ts
index 8d5773c..bf8739d 100644
--- a/src/types/collections.ts
+++ b/src/types/collections.ts
@@ -14,7 +14,7 @@ export type CategoryTranslations = {
 }[];
 export type RecorderBiographies = {
   language: string | Language;
-  biography?: string;
+  biography: string;
   id?: string;
 }[];
 export type ContentFoldersTranslation = {
diff --git a/src/types/payload.ts b/src/types/payload.ts
new file mode 100644
index 0000000..5f22061
--- /dev/null
+++ b/src/types/payload.ts
@@ -0,0 +1,8 @@
+import { CollectionConfig } from "payload/types";
+
+export type PayloadCreateData<T> = Omit<
+  T,
+  "id" | "updatedAt" | "createdAt" | "sizes" | "updatedBy"
+>;
+
+export type CollectionEndpoint = NonNullable<CollectionConfig["endpoints"]>[number];
diff --git a/src/types/strapi.ts b/src/types/strapi.ts
new file mode 100644
index 0000000..21ec7df
--- /dev/null
+++ b/src/types/strapi.ts
@@ -0,0 +1,14 @@
+export type StrapiLanguage = {
+  data?: { attributes: { code: string } };
+};
+
+export type StrapiImage = {
+  data?: {
+    attributes: {
+      url: string;
+      mime: string;
+      name: string;
+      size: number;
+    };
+  };
+};
diff --git a/src/utils/localApi.ts b/src/utils/localApi.ts
index 7bd050e..ae7d8ae 100644
--- a/src/utils/localApi.ts
+++ b/src/utils/localApi.ts
@@ -1,5 +1,6 @@
 import payload from "payload";
 import { Collections, KeysTypes } from "../constants";
+import { StrapiImage } from "../types/strapi";
 import { isDefined } from "./asserts";
 
 export const findWeaponType = async (name: string): Promise<string> => {
@@ -23,20 +24,10 @@ type UploadStrapiImage = {
   collection: Collections;
 };
 
-type StrapiImage = {
-  data?: {
-    attributes: {
-      url: string;
-      mime: string;
-      name: string;
-      size: number;
-    };
-  };
-};
 export const uploadStrapiImage = async ({
   collection,
   image,
-}: UploadStrapiImage): Promise<string> => {
+}: UploadStrapiImage): Promise<string | undefined> => {
   if (isDefined(image.data)) {
     const url = `${process.env.STRAPI_URI}${image.data.attributes.url}`;
 
diff --git a/src/utils/recursiveBlocks.ts b/src/utils/recursiveBlocks.ts
index 8980ac2..f2bd892 100644
--- a/src/utils/recursiveBlocks.ts
+++ b/src/utils/recursiveBlocks.ts
@@ -1,4 +1,5 @@
 import { Block, BlockField } from "payload/types";
+import { capitalize } from "./string";
 
 const isDefined = <T>(value: T | null | undefined): value is T =>
   value !== null && value !== undefined;
@@ -26,11 +27,6 @@ export const generateBlocks = <T extends string>(blocksConfig: BlocksConfig<T>):
     recursionFieldName in block;
 
   const getInterfaceName = (parents: T[], currentBlockName: T): string => {
-    const capitalize = (text: string): string => {
-      if (text.length === 0) return text;
-      const [firstLetter, ...rest] = text;
-      return [firstLetter.toUpperCase(), ...rest].join("");
-    };
     return [...parents, currentBlockName]
       .map((blockName) => blocksConfig[blockName].block.slug)
       .map(capitalize)
diff --git a/src/utils/string.ts b/src/utils/string.ts
index bf00c3d..3791702 100644
--- a/src/utils/string.ts
+++ b/src/utils/string.ts
@@ -1,13 +1,15 @@
 import tags from "language-tags";
+import { isUndefined } from "./asserts";
 
 export const shortenEllipsis = (text: string, length: number): string =>
   text.length - 3 > length ? `${text.substring(0, length)}...` : text;
 
 export const formatLanguageCode = (code: string): string =>
-  tags(code).valid() ? tags(code).language().descriptions()[0] : code;
+  tags(code).valid() ? tags(code).language()?.descriptions()[0] ?? code : code;
 
 export const capitalize = (string: string): string => {
   const [firstLetter, ...otherLetters] = string;
+  if (isUndefined(firstLetter)) return "";
   return [firstLetter.toUpperCase(), ...otherLetters].join("");
 };
 
diff --git a/src/utils/types.ts b/src/utils/types.ts
deleted file mode 100644
index f4d24e8..0000000
--- a/src/utils/types.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-export type PayloadCreateData<T> = Omit<
-  T,
-  "id" | "updatedAt" | "createdAt" | "sizes" | "updatedBy"
->;
diff --git a/tsconfig.json b/tsconfig.json
index 0f9e073..c236f7b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,18 +1,116 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
-    "moduleResolution": "NodeNext",
-    "lib": ["dom", "dom.iterable", "esnext"],
-    "allowJs": true,
-    "strict": false,
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "outDir": "./dist",
-    "rootDir": "./src",
-    "jsx": "react",
+    /* Visit https://aka.ms/tsconfig to read more about this file */
+
+    /* Projects */
+    // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+
+    /* Language and Environment */
+    "target": "ES2022" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ] /* Specify a set of bundled library declaration files that describe the target runtime environment. */,
+    "jsx": "react" /* Specify what JSX code is generated. */,
+    // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
+    // "reactNamespace": "",                             /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
+    // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+    // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
+
+    /* Modules */
+    "module": "commonjs" /* Specify what module code is generated. */,
+    "rootDir": "./src" /* Specify the root folder within your source files. */,
+    // "moduleResolution": "node10",                     /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     "paths": {
       "payload/generated-types": ["./src/payload-types.ts"]
-    }
+    } /* Specify a set of entries that re-map imports to additional lookup locations. */,
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
+    // "allowImportingTsExtensions": true,               /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
+    // "resolvePackageJsonExports": true,                /* Use the package.json 'exports' field when resolving package imports. */
+    // "resolvePackageJsonImports": true,                /* Use the package.json 'imports' field when resolving imports. */
+    // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files. */
+    // "allowArbitraryExtensions": true,                 /* Enable importing files with any extension, provided a declaration file is present. */
+    // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
+
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
+
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
+    "outDir": "./dist" /* Specify an output folder for all emitted files. */,
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types. */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
+    // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
+
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
+
+    /* Type Checking */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
+    // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
+    "alwaysStrict": true /* Ensure 'use strict' is always emitted. */,
+    // "noUnusedLocals": true,                           /* Enable error reporting when local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read. */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    "noFallthroughCasesInSwitch": true /* Enable error reporting for fallthrough cases in switch statements. */,
+    "noUncheckedIndexedAccess": true /* Add 'undefined' to a type when accessed using an index. */,
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+
+    /* Completeness */
+    // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
   },
   "include": ["src"],
   "exclude": ["node_modules", "dist", "build"],