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', 'cc87mjpcck4gc8a6b5bajk9kn6', '18.219.8.51', '1746946290', '1746946290', '/product_info.php?info=p631_800369-Einsatz-fuer-Elektro-Futterdaempfer-160-Liter.html')

[XT SQL Error]