diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsController.kt
index 714295d87e..b1e7959f67 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaDetailsController.kt
@@ -1088,7 +1088,7 @@ class MangaDetailsController : BaseController,
                 presenter.toggleFavorite()
                 showAddedSnack()
             }
-            val ids = presenter.getMangaCategoryIds(manga)
+            val ids = presenter.getMangaCategoryIds()
             val preselected = ids.mapNotNull { id ->
                 categories.indexOfFirst { it.id == id }.takeIf { it != -1 }
             }.toTypedArray()
@@ -1115,24 +1115,23 @@ class MangaDetailsController : BaseController,
     }
 
     private fun toggleMangaFavorite() {
-        val manga = presenter.manga
         if (presenter.toggleFavorite()) {
             val categories = presenter.getCategories()
             val defaultCategoryId = presenter.preferences.defaultCategory()
             val defaultCategory = categories.find { it.id == defaultCategoryId }
             when {
-                defaultCategory != null -> presenter.moveMangaToCategory(manga, defaultCategory)
+                defaultCategory != null -> presenter.moveMangaToCategory(defaultCategory)
                 defaultCategoryId == 0 || categories.isEmpty() -> // 'Default' or no category
-                    presenter.moveMangaToCategory(manga, null)
+                    presenter.moveMangaToCategory(null)
                 else -> {
-                    val ids = presenter.getMangaCategoryIds(manga)
+                    val ids = presenter.getMangaCategoryIds()
                     val preselected = ids.mapNotNull { id ->
                         categories.indexOfFirst { it.id == id }.takeIf { it != -1 }
                     }.toTypedArray()
 
                     AddToLibraryCategoriesDialog(
                         this,
-                        manga,
+                        presenter.manga,
                         categories,
                         preselected
                     ).showDialog(router)
@@ -1174,12 +1173,11 @@ class MangaDetailsController : BaseController,
     override fun mangaPresenter(): MangaDetailsPresenter = presenter
 
     override fun updateCategoriesForMangas(mangas: List<Manga>, categories: List<Category>) {
-        val manga = mangas.firstOrNull() ?: return
-        presenter.moveMangaToCategories(manga, categories)
+        presenter.moveMangaToCategories(categories)
     }
 
     override fun updateCategoriesForManga(manga: Manga?, categories: List<Category>) {
-        manga?.let { presenter.moveMangaToCategories(manga, categories) }
+        manga?.let { presenter.moveMangaToCategories(categories) }
     }
 
     override fun addToLibraryCancelled(manga: Manga?, position: Int) {
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 dedb3f7f07..63b3696ede 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
@@ -375,6 +375,7 @@ class MangaDetailsPresenter(
         if (update) controller.updateChapters(this.chapters)
     }
 
+    /** Refresh Manga Info and Chapter List (not tracking) */
     fun refreshAll() {
         scope.launch {
             isLoading = true
@@ -590,8 +591,8 @@ class MangaDetailsPresenter(
      * @param manga the manga to move.
      * @param category the selected category, or null for default category.
      */
-    fun moveMangaToCategory(manga: Manga, category: Category?) {
-        moveMangaToCategories(manga, listOfNotNull(category))
+    fun moveMangaToCategory(category: Category?) {
+        moveMangaToCategories(listOfNotNull(category))
     }
 
     /**
@@ -600,7 +601,7 @@ class MangaDetailsPresenter(
      * @param manga the manga to move.
      * @param categories the selected categories.
      */
-    fun moveMangaToCategories(manga: Manga, categories: List<Category>) {
+    fun moveMangaToCategories(categories: List<Category>) {
         val mc = categories.filter { it.id != 0 }.map { MangaCategory.create(manga, it) }
         db.setMangaCategories(mc, listOf(manga))
     }
@@ -611,7 +612,7 @@ class MangaDetailsPresenter(
      * @param manga the manga to get categories from.
      * @return Array of category ids the manga is in, if none returns default id
      */
-    fun getMangaCategoryIds(manga: Manga): Array<Int> {
+    fun getMangaCategoryIds(): Array<Int> {
         val categories = db.getCategoriesForManga(manga).executeAsBlocking()
         return categories.mapNotNull { it.id }.toTypedArray()
     }