1366 - Incorrect integer value: '' for column `hbl_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', '2e55epjaqhqv8o1r074ui1kc24', '3.143.209.210', '1746986751', '1746986751', '/product_info.php?info=p648_806439-Deckel-fuer-200-Liter-Futterdaempfer.html')

[XT SQL Error]