From 43c83d2de1cd2cb861ba57f80dc903c837cb8181 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Wed, 23 Feb 2022 17:07:29 +0900
Subject: [PATCH] Add note about why `RoomID` is nulled in `DeepClone`

---
 osu.Game/Online/Rooms/Room.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/osu.Game/Online/Rooms/Room.cs b/osu.Game/Online/Rooms/Room.cs
index 5deedaaa6b..b301c81921 100644
--- a/osu.Game/Online/Rooms/Room.cs
+++ b/osu.Game/Online/Rooms/Room.cs
@@ -162,6 +162,8 @@ namespace osu.Game.Online.Rooms
             var copy = new Room();
 
             copy.CopyFrom(this);
+
+            // ID must be unset as we use this as a marker for whether this is a client-side (not-yet-created) room or not.
             copy.RoomID.Value = null;
 
             return copy;