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', 'o2oubkik3nh4bni67i2j48joj2', '3.137.161.222', '1713541935', '1713541935', '/login.php?XTCsid=o2oubkik3nh4bni67i2j48joj2')

[XT SQL Error]