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', 'gm28jc2bvq22lchvcdvj22pf11', '18.189.145.20', '1713502861', '1713502861', '/login.php?XTCsid=gm28jc2bvq22lchvcdvj22pf11')

[XT SQL Error]