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', 'a34ug7i6oknaovj16t83shsl26', '18.222.184.135', '1718730442', '1718730442', '/shopping_cart.php?cat=c373_4Gb.html&stock=inventory&view=ext')

[XT SQL Error]