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', 'm2eitta0elrf4dui7qt5db70o0', '18.226.177.46', '1738999611', '1738999611', '/index.php?XTCsid=8e9c41f9ih262sbjeph8l1hut4&cat=c1147_Linstrap-Werkzeug-Akku.html')

[XT SQL Error]