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', '2ff15959ceee65be9dd368d552f7c470', '44.211.91.23', '1711705274', '1711705274', '/checkout_shipping.php?XTCsid=34eb3af5dd83507b4e3d18340087e638')

[XT SQL Error]