text: update contacts
  set verified_user_id = NULL
  where not exists (select id from "user" as u where contacts.verified_user_id = u.id);
  
  ALTER TABLE contacts
    ADD CONSTRAINT contacts_verified_user_fkey FOREIGN KEY (verified_user_id)
        REFERENCES "user" (id) MATCH SIMPLE
        ON UPDATE SET NULL ON DELETE SET NULL;
  
  ALTER TABLE order_item_temp ADD COLUMN service_name character varying(255);
  ALTER TABLE order_item_temp ALTER COLUMN service_name SET NOT NULL;
  