db-schema/db_scripts/diff/15809.down

USE provisioning;
SET autocommit=0;

SELECT `id` FROM `voip_preferences`
  WHERE attribute='announce_conn_type'
  INTO @pref_id;

UPDATE `voip_preferences_enum` set value = 'NULL'
  WHERE preference_id = @pref_id AND usr_pref = 1 AND label = 'use domain default';

COMMIT;