1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', '78e627b4dfd97c0ba104a84eaf24ea74', '3.17.6.75', '1713589624', '1713589624', '/product_info.php?info=p324_Selbstklebende-Folie--Lochfolie-KFZ.html')

[XT SQL Error]