diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/library/CustomMangaManager.kt b/app/src/main/java/eu/kanade/tachiyomi/data/library/CustomMangaManager.kt
index 4650c20a69..2fcf3d5003 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/library/CustomMangaManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/library/CustomMangaManager.kt
@@ -197,7 +197,7 @@ class CustomMangaManager(val context: Context) {
                     author: String? = null,
                     artist: String? = null,
                     description: String? = null,
-                    genre: String = "",
+                    genre: String? = null,
                     status: Int? = null,
                 ): ComicInfoYokai {
                     return ComicInfoYokai(
@@ -214,7 +214,7 @@ class CustomMangaManager(val context: Context) {
                             coverArtist = null,
                             translator = null,
                             summary = description?.let { ComicInfo.Summary(it) },
-                            genre = genre.takeIf { it.isNotEmpty() }?.let { ComicInfo.Genre(it) },
+                            genre = genre?.let { ComicInfo.Genre(it) },
                             tags = null,
                             web = null,
                             publishingStatus = status.takeUnless { it == 0 }?.let {
@@ -235,5 +235,6 @@ class CustomMangaManager(val context: Context) {
     private fun mangaFromComicInfoObject(id: Long, comicInfo: ComicInfo) = MangaImpl().apply {
         this.id = id
         this.copyFromComicInfo(comicInfo)
+        this.title = comicInfo.series?.value ?: ""
     }
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsPresenter.kt
index 68c66e19fa..742afb7ca2 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsPresenter.kt
@@ -712,7 +712,15 @@ class MangaDetailsPresenter(
     fun confirmDeletion() {
         launchIO {
             coverCache.deleteFromCache(manga)
-            customMangaManager.saveMangaInfo(CustomMangaManager.ComicList.ComicInfoYokai.create(manga.id!!))
+            customMangaManager.saveMangaInfo(CustomMangaManager.ComicList.ComicInfoYokai.create(
+                id = manga.id!!,
+                title = null,
+                author = null,
+                artist = null,
+                description = null,
+                genre = null as String?,
+                status = null,
+            ))
             downloadManager.deleteManga(manga, source)
             asyncUpdateMangaAndChapters(true)
         }