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', 'kju9lq3tc488lvng5e4ur20mr2', '18.117.157.139', '1746773471', '1746773471', '/product_info.php?info=p50_802356-Huehner-Futtertrog--50-cm.html')

[XT SQL Error]