-- Place your SQL code here

USE vn;

ALTER TABLE vn.itemShelving DROP FOREIGN KEY itemShelvingBuy_FK;
ALTER TABLE vn.itemShelving DROP FOREIGN KEY itemShelving_fk2;
ALTER TABLE vn.itemShelving DROP INDEX itemShelving_UN;

ALTER TABLE vn.itemShelving ADD CONSTRAINT itemShelving_fk2 FOREIGN KEY (shelvingFk) REFERENCES vn.shelving(code) ON DELETE CASCADE ON UPDATE CASCADE;
ALTER TABLE vn.itemShelving ADD CONSTRAINT itemShelvingBuy_FK FOREIGN KEY (buyFk) REFERENCES vn.buy(id) ON DELETE RESTRICT ON UPDATE RESTRICT;