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', '2f5d025092f83faff8b9980dc83924c9', '3.16.81.94', '1713444365', '1713444365', '/checkout_shipping.php?XTCsid=ed890d870a93292a1cc254113c4cf12e')

[XT SQL Error]