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', 'u1d3haf07sk3fi2d13krrgpbn2', '3.16.218.62', '1713911433', '1713911433', '/login.php?XTCsid=u1d3haf07sk3fi2d13krrgpbn2')

[XT SQL Error]