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', 'e3befb1bb2b58bb128e5472c7627c9b7', '216.73.216.3', '1767312922', '1767312922', '/product_info.php?info=p1537_Peru-Satellitenbild.html')

[XT SQL Error]