Probably fix random source crashes

app/src/main/java/eu/kanade/data/manga/MangaRepositoryImpl.kt

@@ -79,6 +79,11 @@ class MangaRepositoryImpl(
 
     override suspend fun insert(manga: Manga): Long? {
         return handler.awaitOneOrNull(true) {
+            // SY -->
+            if (mangasQueries.getIdByUrlAndSource(manga.url, manga.source).executeAsOneOrNull() != null) {
+                return@awaitOneOrNull mangasQueries.getIdByUrlAndSource(manga.url, manga.source)
+            }
+            // SY <--
             mangasQueries.insert(
                 source = manga.source,
                 url = manga.url,

app/src/main/java/eu/kanade/tachiyomi/ui/browse/feed/FeedPresenter.kt

@@ -260,7 +260,6 @@ open class FeedPresenter(
      * @param sManga the manga from the source.
      * @return a manga from the database.
      */
-    @Synchronized
     private fun networkToLocalManga(sManga: SManga, sourceId: Long): Manga {
         var localManga = runBlocking { getManga.await(sManga.url, sourceId) }
         if (localManga == null) {

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/feed/SourceFeedPresenter.kt

@@ -219,7 +219,6 @@ open class SourceFeedPresenter(
      * @param sManga the manga from the source.
      * @return a manga from the database.
      */
-    @Synchronized
     private fun networkToLocalManga(sManga: SManga, sourceId: Long): Manga {
         var localManga = runBlocking { getManga.await(sManga.url, sourceId) }
         if (localManga == null) {