diff --git a/app/src/main/java/eu/kanade/domain/manga/model/Manga.kt b/app/src/main/java/eu/kanade/domain/manga/model/Manga.kt
index 1f780cdd3..e03973910 100644
--- a/app/src/main/java/eu/kanade/domain/manga/model/Manga.kt
+++ b/app/src/main/java/eu/kanade/domain/manga/model/Manga.kt
@@ -166,11 +166,11 @@ data class Manga(
             // SY <--
             source = -1L,
             favorite = false,
-            lastUpdate = -1L,
-            dateAdded = -1L,
-            viewerFlags = -1L,
+            lastUpdate = 0L,
+            dateAdded = 0L,
+            viewerFlags = 0L,
             chapterFlags = 0L,
-            coverLastModified = -1L,
+            coverLastModified = 0L,
             // SY -->
             ogArtist = null,
             ogAuthor = null,
diff --git a/app/src/main/sqldelight/migrations/18.sqm b/app/src/main/sqldelight/migrations/18.sqm
index 9aa12f767..6ba61cea8 100644
--- a/app/src/main/sqldelight/migrations/18.sqm
+++ b/app/src/main/sqldelight/migrations/18.sqm
@@ -1,3 +1,15 @@
 UPDATE mangas
 SET chapter_flags = 0
-WHERE chapter_flags = -1;
\ No newline at end of file
+WHERE chapter_flags = -1;
+UPDATE mangas
+SET viewer = 0
+WHERE viewer = -1;
+UPDATE mangas
+SET date_added = 0
+WHERE date_added = -1;
+UPDATE mangas
+SET cover_last_modified = 0
+WHERE cover_last_modified = -1;
+UPDATE mangas
+SET last_update = 0
+WHERE last_update = -1;
\ No newline at end of file