1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', 'abc465909fccd2d2d55b8ac8f9fb8e11', '216.73.216.142', '1758244228', '1758244228', '/product_info.php/info/p3987_Europa-Reliefkarte.html')

[XT SQL Error]