correctly delete old rooms

Assets/Portal/Runtime/PortalDriverClone.cs

@@ -40,5 +40,10 @@ namespace EscapeRoomEngine.Portal.Runtime
                     portal.linkedPortal.portalTransform.worldToLocalMatrix * cloning.localToWorldMatrix;
             transform.SetPositionAndRotation(m.GetPosition(), m.rotation);
         }
+
+        public override string ToString()
+        {
+            return gameObject.name;
+        }
     }
 }