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', '17696ae096482d7d93518ee1ffe7b481', '216.73.216.126', '1751425082', '1751425082', '/shopping_cart.php/language/de')

[XT SQL Error]