ALTER TABLE `vn`.`ticketService` 
DROP FOREIGN KEY `ticketServiceIvaGroup`;
ALTER TABLE `vn`.`ticketService` 
CHANGE COLUMN `taxClassFk` `taxClassFk` TINYINT(3) UNSIGNED NOT NULL DEFAULT 2 ;
ALTER TABLE `vn`.`ticketService` 
ADD CONSTRAINT `ticketServiceIvaGroup`
  FOREIGN KEY (`taxClassFk`)
  REFERENCES `vn`.`taxClass` (`id`)
  ON UPDATE CASCADE;