Fix attempt #2

boards/models/post/manager.py

@@ -154,7 +154,7 b' class PostManager(models.Manager):'
         url_to_post = '[post]{}[/post]'.format(str(global_id))
         replies = self.filter(text__contains=url_to_post)
         for reply in replies:
-            post_import_deps.send(reply.__class__, reply)
+            post_import_deps.send(reply.__class__, instance=reply)
 
     @transaction.atomic
     def update_post(self, post, title: str, text: str, pub_time: str,