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', '3a5feufuj60cdrg8152qe32ft1', '216.73.216.112', '1761673458', '1761673458', '/product_info.php?info=p647_800109-Deckel-fuer-Futterdaempfer-160-L.html')

[XT SQL Error]