START TRANSACTION;

SET @isTriggerDisabled = TRUE;

ALTER TABLE vn.buy ADD groupingMode2 enum('grouping', 'packing') DEFAULT NULL NULL;
ALTER TABLE vn.buy CHANGE groupingMode2 groupingMode2 enum('grouping', 'packing') DEFAULT NULL NULL AFTER groupingMode;

UPDATE vn.buy SET groupingMode2 = 'packing' WHERE groupingMode = 2;
UPDATE vn.buy SET groupingMode2 = 'grouping' WHERE groupingMode = 1;

ALTER TABLE vn.buy DROP COLUMN groupingMode;
ALTER TABLE vn.buy CHANGE groupingMode2 groupingMode enum('grouping','packing') CHARACTER SET utf8mb3 COLLATE utf8mb3_unicode_ci DEFAULT NULL NULL;

SET @isTriggerDisabled = FALSE;

COMMIT;