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', 'ae57b6fe27e6ffc1129c9d034774fe61', '216.73.216.20', '1771725220', '1771725220', '/product_info.php?info=p3393_Madagaskar-Reliefkarte.html')

[XT SQL Error]