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', '8g1os3pmopl1mprtfdcaio1jk5', '18.223.106.195', '1738995481', '1738995481', '/index.php?XTCsid=3ea3bnp0vmbqarg8bfequsbfv5&cat=c1084_Fromm-Werkzeug-Akku.html')

[XT SQL Error]