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', 'tqgrvub9itc5911rfs16tfr526', '3.23.101.60', '1714027209', '1714027209', '/login.php?XTCsid=tqgrvub9itc5911rfs16tfr526')

[XT SQL Error]