Cleanup seasons after creating real ones

MediaBrowser.Providers/TV/SeriesMetadataService.cs

@@ -61,8 +61,8 @@ namespace MediaBrowser.Providers.TV
             await base.AfterMetadataRefresh(item, refreshOptions, cancellationToken).ConfigureAwait(false);
 
             RemoveObsoleteEpisodes(item);
-            RemoveObsoleteSeasons(item);
             await CreateSeasonsAsync(item, cancellationToken).ConfigureAwait(false);
+            RemoveObsoleteSeasons(item);
         }
 
         /// <inheritdoc />