1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'c859f153bdcc167b37a23214f26615c6', '3.131.110.169', '1713906203', '1713906203', '/product_info.php?info=p302_Frecher-Lauser.html&XTCsid=244b07160d2ebeb432977424993b1b59')

[XT SQL Error]