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', '1fcg1a6c572d06gj9hmd5kbug7', '184.72.135.210', '1711668937', '1711668937', '/login.php?XTCsid=1fcg1a6c572d06gj9hmd5kbug7')

[XT SQL Error]