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', 'c1e1cb4ebd866a2f43d884565d108740', '216.73.216.3', '1767584947', '1767584947', '/product_info.php?info=p3107_Mexiko-Reliefkarte.html')

[XT SQL Error]