1366 - Incorrect integer value: '' for column `artcom-ug`.`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', 'g4f38khutpd5c7r2g51t1e4010', '18.219.185.67', '1718728686', '1718728686', '/shopping_cart.php?cat=c687_%D0%90%D0%B1%D0%BE%D0%BD%D0%B5%D0%BD%D1%82%D1%81%D0%BA%D0%B8%D0%B5%20%D1%80%D0%BE%D0%B7%D0%B5%D1%82%D0%BA%D0%B8.html&page=2&stock=inventory&view=list')

[XT SQL Error]