1366 - Incorrect integer value: '' for column `shop_db3`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'd30b303e74e303ce4813d2b1fbaeacbd', '18.221.112.220', '1714155013', '1714155013', '/shopping_cart.php?XTCsid=865ed233708c13d8294a9cd1f6a7eff1')

[XT SQL Error]