1366 - Incorrect integer value: '' for column `CP_as15`.`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', 'di2p2571jo1es89nq7r2698as6', '3.137.166.5', '1738996096', '1738996096', '/index.php?XTCsid=e08p0achgq0tssilr9o0o9bta6&cat=c1246_Werkzeug.html')

[XT SQL Error]