mySQL Error 1213: Deadlock found when trying to get lock; try restarting transaction  (UPDATE Seat SET seat_user_id = null, seat_order_id = null, seat_status = 'free', seat_ts = null, seat_sid = null, seat_price = null, seat_discount_id = null, seat_coupon_id = null, seat_status_res_time = null, seat_coupon_price = null, seat_code = null, seat_addons = null WHERE `seat_id` = '14938580')