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', 'e4c65c926eaede302f3295c3d6459acf', '216.73.216.155', '1751312825', '1751312825', '/index.php/language/de/cat/c35_Countries.html/page/4')

[XT SQL Error]