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', '8a7dd1facd89ac9e3fab20bd8ba0c9b1', '216.73.216.116', '1752391042', '1752391042', '/product_info.php/info/p2990_Belgien-Reliefkarte.html')

[XT SQL Error]