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', '1u6a00bu2nqjunr1b46o54srj5', '3.133.160.156', '1713506713', '1713506713', '/login.php?XTCsid=1u6a00bu2nqjunr1b46o54srj5')

[XT SQL Error]