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', '1ab27f63e2c38985f648e0b4dd6d8e48', '216.73.216.108', '1763397431', '1763397431', '/product_info.php?info=p2964_Senegal-Reliefkarte.html')

[XT SQL Error]