From 4c22b55ce345a7e0b05aef98f165e1969fd42332 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Tue, 26 Jul 2022 17:00:28 +0900
Subject: [PATCH] Fix incorrect handling if an update is processed with no
 changes

---
 osu.Game/Beatmaps/BeatmapImporter.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/osu.Game/Beatmaps/BeatmapImporter.cs b/osu.Game/Beatmaps/BeatmapImporter.cs
index 1e90e14e68..ef0e76234a 100644
--- a/osu.Game/Beatmaps/BeatmapImporter.cs
+++ b/osu.Game/Beatmaps/BeatmapImporter.cs
@@ -52,6 +52,10 @@ namespace osu.Game.Beatmaps
 
             var first = imported.First();
 
+            // If there were no changes, ensure we don't accidentally nuke ourselves.
+            if (first.ID == original.ID)
+                return first;
+
             first.PerformWrite(updated =>
             {
                 var realm = updated.Realm;