diff --git a/osu.Game/Beatmaps/BeatmapManager.cs b/osu.Game/Beatmaps/BeatmapManager.cs
index 9c9b995955..d60cfdee9e 100644
--- a/osu.Game/Beatmaps/BeatmapManager.cs
+++ b/osu.Game/Beatmaps/BeatmapManager.cs
@@ -128,10 +128,10 @@ namespace osu.Game.Beatmaps
             foreach (var timingPoint in referenceBeatmap.Beatmap.ControlPointInfo.TimingPoints)
                 newBeatmap.ControlPointInfo.Add(timingPoint.Time, timingPoint.DeepClone());
 
-            var createdBeatmapInfo = beatmapModelManager.AddDifficultyToBeatmapSet(beatmapSetInfo, newBeatmap);
+            beatmapModelManager.AddDifficultyToBeatmapSet(beatmapSetInfo, newBeatmap);
 
-            workingBeatmapCache.Invalidate(createdBeatmapInfo.BeatmapSet);
-            return GetWorkingBeatmap(createdBeatmapInfo);
+            workingBeatmapCache.Invalidate(beatmapSetInfo);
+            return GetWorkingBeatmap(newBeatmap.BeatmapInfo);
         }
 
         // TODO: add back support for making a copy of another difficulty
diff --git a/osu.Game/Beatmaps/BeatmapModelManager.cs b/osu.Game/Beatmaps/BeatmapModelManager.cs
index a9da221e08..b9f0af8833 100644
--- a/osu.Game/Beatmaps/BeatmapModelManager.cs
+++ b/osu.Game/Beatmaps/BeatmapModelManager.cs
@@ -93,19 +93,14 @@ namespace osu.Game.Beatmaps
         /// <summary>
         /// Add a new difficulty to the beatmap set represented by the provided <see cref="BeatmapSetInfo"/>.
         /// </summary>
-        public BeatmapInfo AddDifficultyToBeatmapSet(BeatmapSetInfo beatmapSetInfo, Beatmap beatmap)
+        public void AddDifficultyToBeatmapSet(BeatmapSetInfo beatmapSetInfo, Beatmap beatmap)
         {
-            return Realm.Run(realm =>
-            {
-                var beatmapInfo = beatmap.BeatmapInfo;
+            var beatmapInfo = beatmap.BeatmapInfo;
 
-                beatmapSetInfo.Beatmaps.Add(beatmapInfo);
-                beatmapInfo.BeatmapSet = beatmapSetInfo;
+            beatmapSetInfo.Beatmaps.Add(beatmapInfo);
+            beatmapInfo.BeatmapSet = beatmapSetInfo;
 
-                Save(beatmapInfo, beatmap);
-
-                return beatmapInfo.Detach();
-            });
+            Save(beatmapInfo, beatmap);
         }
 
         private static string getFilename(BeatmapInfo beatmapInfo)