ALTER TABLE `vn`.`itemLog` CHANGE COLUMN `id` `id` INT(11) NOT NULL AUTO_INCREMENT , ADD PRIMARY KEY (`id`); ALTER TABLE `vn`.`itemLog` DROP FOREIGN KEY `itemLogUserFk`; ALTER TABLE `vn`.`itemLog` CHANGE COLUMN `id` `id` INT(11) NOT NULL AUTO_INCREMENT , CHANGE COLUMN `userFk` `userFk` INT(10) UNSIGNED NULL DEFAULT NULL ; ALTER TABLE `vn`.`itemLog` ADD CONSTRAINT `itemLogUserFk` FOREIGN KEY (`userFk`) REFERENCES `account`.`user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;