Only resign our own events

synapse/handlers/federation.py

@@ -1093,6 +1093,7 @@ class FederationHandler(BaseHandler):
         )
 
         if event:
+            if self.hs.is_mine_id(event.event_id):
                 # FIXME: This is a temporary work around where we occasionally
                 # return events slightly differently than when they were
                 # originally signed