[search][models] Added natural_key dependencies

beat/web/search/models.py

@@ -146,6 +146,7 @@ class Leaderboard(models.Model):
 
     def natural_key(self):
         return (self.search.author.username, self.search.name, self.search.version)
+    natural_key.dependencies = ['search.search']
 
     def get_absolute_url(self):
         return reverse(