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', '2153875209c08fadbad1e75615f6f270', '18.188.66.13', '1714034645', '1714034645', '/product_info.php?info=p322_Selbstklebende-Folie--Glasdecor.html')

[XT SQL Error]