db-schema/db_scripts/diff/15517.up

USE provisioning;
SET autocommit=0;

ALTER TABLE voip_header_rule_sets
    ADD `subscriber_id` int(11) unsigned AFTER reseller_id,
    ADD UNIQUE KEY vhrs_subscriber_idx (subscriber_id),
    ADD CONSTRAINT `vhrs_subscriber_ref` FOREIGN KEY (`subscriber_id`) REFERENCES `provisioning`.`voip_subscribers` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;

commit;