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', '9ce94b1e4fbcf93671acc3818c87c7b6', '216.73.216.3', '1767297134', '1767297134', '/product_info.php?info=p3144_Somalia-Reliefkarte.html')

[XT SQL Error]