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', '8e3lmjbj2b948f1vln46tfnii2', '3.149.230.44', '1713519064', '1713519064', '/login.php?XTCsid=8e3lmjbj2b948f1vln46tfnii2')

[XT SQL Error]