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', 'bdpn8nr0vqooo5el1vkuvat2j3', '3.15.7.241', '1746787808', '1746787808', '/product_info.php?info=p658_806057-Hackfruchtreibe-Extrafein.html')

[XT SQL Error]