1366 - Incorrect integer value: '' for column `pella-ware`.`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', '439ivm9oobg2332s1vk5i3dsb1', '18.226.93.207', '1713550500', '1713550500', '/login.php?XTCsid=439ivm9oobg2332s1vk5i3dsb1')

[XT SQL Error]