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', 'dcmm3jd0b2dm6t2eifso551ki4', '3.234.253.152', '1711695971', '1711695971', '/login.php?XTCsid=dcmm3jd0b2dm6t2eifso551ki4')

[XT SQL Error]