Sync merged thread only only

misago/threads/moderation/threads.py

@@ -91,8 +91,6 @@ def merge_thread(user, thread, other_thread):
     })
 
     thread.merge(other_thread)
-    thread.synchronize()
-    thread.save()
     other_thread.delete()
     return True
 

misago/threads/views/generic/forum/actions.py

@@ -255,6 +255,9 @@ class ForumActions(Actions):
                         moderation.merge_thread(
                             request.user, merged_thread, thread)
 
+                    merged_thread.synchronize()
+                    merged_thread.save()
+
                 with atomic():
                     self.forum.synchronize()
                     self.forum.save()