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', 'l4759p93nr9mm0eddfdv9i0ks0', '3.139.236.89', '1713491132', '1713491132', '/login.php?XTCsid=l4759p93nr9mm0eddfdv9i0ks0')

[XT SQL Error]