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', 'ef27e234b0d1b8927bcbc224c9e3e54d', '216.73.216.191', '1758176879', '1758176879', '/product_info.php/language/en/info/p10_3D-Druck.html')

[XT SQL Error]