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', '2b4f1d0c5b2ca8bb6a01d09d71adbac2', '216.73.216.191', '1758173332', '1758173332', '/product_info.php/language/de/refID/2/info/p439_Reliefkarten-Konfigurator.html')

[XT SQL Error]