text: 
  ALTER TABLE orgs
  	DROP CONSTRAINT org_name_valid_chars,
  	ADD CONSTRAINT org_name_valid_chars CHECK (name ~ '^[a-zA-Z0-9](?:[a-zA-Z0-9]|-(?=[a-zA-Z0-9])){0,38}$');
  
  ALTER TABLE users
  	DROP CONSTRAINT users_username_valid,
  	ADD CONSTRAINT users_username_valid CHECK (username ~ '^[a-zA-Z0-9](?:[a-zA-Z0-9]|-(?=[a-zA-Z0-9])){0,38}$');
  
  COMMIT;