Backport pull request #11743 from jellyfin/release-10.9.z

Fix replace logic

Original-merge: 2ddb15c784

Merged-by: joshuaboniface <joshua@boniface.me>

Backported-by: Joshua M. Boniface <joshua@boniface.me>

MediaBrowser.Providers/Music/MusicVideoMetadataService.cs

@@ -1,5 +1,6 @@
 #pragma warning disable CS1591
 
+using System.Linq;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -45,6 +46,10 @@ namespace MediaBrowser.Providers.Music
             {
                 targetItem.Artists = sourceItem.Artists;
             }
+            else
+            {
+                targetItem.Artists = targetItem.Artists.Concat(sourceItem.Artists).Distinct().ToArray();
+            }
         }
     }
 }