INSERT INTO carrello(session, user, prodotto, quantita, ip, data_aggiunta) VALUES ('a2b49dc1a657d19f1dfa89548591b55c', , 170, 1, '54.224.103.239', NOW() ) ON DUPLICATE KEY UPDATE user=user
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' 170, 1, '54.224.103.239', NOW() ) ON DUPLICATE KEY UPDATE user=user' at line 1