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', 'bda55ca5d0aac07d1323bd83a8e74e2f', '216.73.216.142', '1758257337', '1758257337', '/index.php/cat/c42_Vektorkarten.html')

[XT SQL Error]