Schema editor destroys constraint

[hendi]

This is the diff I see after changing another field in the listings table:

-ALTER TABLE listings ADD CONSTRAINT source CHECK ((NOT (user_id IS NOT NULL AND agent_id IS NOT NULL)) AND (user_id IS NOT NULL OR agent_id IS NOT NULL));
+ALTER TABLE listings ADD CONSTRAINT source CHECK ((NOT user_id IS NOT NULL AND agent_id IS NOT NULL AND user_id IS NOT NULL) OR (agent_id IS NOT NULL));

[mpscholten]

Fixed this on master 👍