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', 'frgjfnvr5mftgbfnn9qood5i37', '18.97.9.175', '1745811649', '1745811649', '/product_info.php?info=p648_806439-Deckel-fuer-200-Liter-Futterdaempfer.html')

[XT SQL Error]