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', '6620334362484a7cacc438652fd2e15d', '3.144.202.167', '1713986640', '1713986640', '/checkout_shipping.php?XTCsid=26fedc8b3cbf5330d12a051fef4e732f')

[XT SQL Error]