1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', 'fdc56d6999c245a3850de9b3415ff818', '3.145.186.173', '1714060718', '1714060718', '/index.php?cat=c85_Floor-Grafik--Bodengestaltung.html')

[XT SQL Error]