Fix logic change

Author: OzGav

music_assistant/controllers/media/albums.py

@@ -443,7 +443,7 @@ async def _set_album_artist(
         self, db_id: int, artist: Artist | ItemMapping, overwrite: bool = False
     ) -> ItemMapping:
         """Store Album Artist info."""
-        db_artist: Artist | ItemMapping = None
+        db_artist: Artist | ItemMapping | None = None
         if artist.provider == "library":
             db_artist = artist
         elif existing := await self.mass.music.artists.get_library_item_by_prov_id(
@@ -456,6 +456,7 @@ async def _set_album_artist(
                 artist, overwrite_existing=overwrite
             )
         # write (or update) record in album_artists table
+        assert self.mass.music.database is not None
         await self.mass.music.database.insert_or_replace(
             DB_TABLE_ALBUM_ARTISTS,
             {