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', 'ttfbr09kbeacj141tlbcbvq4t6', '3.21.231.245', '1713608713', '1713608713', '/login.php?XTCsid=ttfbr09kbeacj141tlbcbvq4t6')

[XT SQL Error]