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', '88f55760b1e19e98a674c2fd8ebaf9a6', '216.73.216.3', '1766965848', '1766965848', '/shop_content.php/coID/25/content/Rueckgaberecht')

[XT SQL Error]