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', '09a0s0lilhpp08955obq01tr44', '3.138.204.208', '1713452204', '1713452204', '/login.php?XTCsid=09a0s0lilhpp08955obq01tr44')

[XT SQL Error]