diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index e08346259..74477e52f 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -22,9 +22,8 @@ android {
 
     defaultConfig {
         applicationId = "eu.kanade.tachiyomi"
-	
+
         versionCode = 104
-      
         versionName = "0.14.6"
 
         buildConfigField("String", "COMMIT_COUNT", "\"${getCommitCount()}\"")
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
index cbca81f49..a3d0f4493 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt
@@ -40,7 +40,7 @@ data class BackupManga(
     @ProtoNumber(104) var history: List<BackupHistory> = emptyList(),
     @ProtoNumber(105) var updateStrategy: UpdateStrategy = UpdateStrategy.ALWAYS_UPDATE,
     @ProtoNumber(106) var lastModifiedAt: Long = 0,
-    @ProtoNumber(107) var favoriteModifiedAt: Long? = 0,
+    @ProtoNumber(107) var favoriteModifiedAt: Long? = null,
 ) {
     fun getMangaImpl(): Manga {
         return Manga.create().copy(
diff --git a/data/src/main/sqldelight/tachiyomi/migrations/25.sqm b/data/src/main/sqldelight/tachiyomi/migrations/25.sqm
index b4d98546a..0cd1c4c07 100644
--- a/data/src/main/sqldelight/tachiyomi/migrations/25.sqm
+++ b/data/src/main/sqldelight/tachiyomi/migrations/25.sqm
@@ -1,7 +1,7 @@
-ALTER TABLE mangas ADD COLUMN last_modified_at INTEGER AS Long NOT NULL;
+ALTER TABLE mangas ADD COLUMN last_modified_at INTEGER AS Long NOT NULL DEFAULT 0;
 ALTER TABLE mangas ADD COLUMN favorite_modified_at INTEGER AS Long;
-ALTER TABLE mangas_categories ADD COLUMN last_modified_at INTEGER AS Long NOT NULL;
-ALTER TABLE chapters ADD COLUMN last_modified_at INTEGER AS Long NOT NULL;
+ALTER TABLE mangas_categories ADD COLUMN last_modified_at INTEGER AS Long NOT NULL DEFAULT 0;
+ALTER TABLE chapters ADD COLUMN last_modified_at INTEGER AS Long NOT NULL DEFAULT 0;
 
 UPDATE mangas SET last_modified_at = strftime('%s', 'now');
 UPDATE mangas SET favorite_modified_at = strftime('%s', 'now') WHERE favorite = 1;
diff --git a/domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt b/domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt
index 6d53afa6a..22e953b58 100644
--- a/domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt
+++ b/domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt
@@ -112,7 +112,7 @@ data class Manga(
             updateStrategy = UpdateStrategy.ALWAYS_UPDATE,
             initialized = false,
             lastModifiedAt = 0L,
-            favoriteModifiedAt = 0L,
+            favoriteModifiedAt = null,
         )
     }
 }