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', 'mt96p9a13kq5j9tinupdkbjhb1', '35.175.172.94', '1711647242', '1711647242', '/login.php?XTCsid=mt96p9a13kq5j9tinupdkbjhb1')

[XT SQL Error]