Fixed: Cleanup duplicated movie translations

src/NzbDrone.Core/Housekeeping/Housekeepers/CleanupDuplicateMovieTranslations.cs

@@ -0,0 +1,27 @@
+using Dapper;
+using NzbDrone.Core.Datastore;
+
+namespace NzbDrone.Core.Housekeeping.Housekeepers
+{
+    public class CleanupDuplicateMovieTranslations : IHousekeepingTask
+    {
+        private readonly IMainDatabase _database;
+
+        public CleanupDuplicateMovieTranslations(IMainDatabase database)
+        {
+            _database = database;
+        }
+
+        public void Clean()
+        {
+            using var mapper = _database.OpenConnection();
+
+            mapper.Execute(@"DELETE FROM ""MovieTranslations""
+            WHERE ""Id"" IN (
+                SELECT MAX(""Id"") FROM ""MovieTranslations""
+                GROUP BY ""MovieMetadataId"", ""Language""
+                HAVING COUNT(""Id"") > 1
+            )");
+        }
+    }
+}