1366 - Incorrect integer value: '' for column `abtecsho_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', '41rgkumkjom7iu4mrft1jrjf67', '216.73.216.175', '1751425720', '1751425720', '/product_info.php/info/p6356_F3-AKM-Fettbrandloescher.html')

[XT SQL Error]