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', '968b04d45e3f9d8bdbdbf93d01b729b4', '216.73.216.3', '1767615001', '1767615001', '/product_info.php?info=p3255_Mazedonien-Reliefkarte.html')

[XT SQL Error]