1366 - Incorrect integer value: '' for column `hbl_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', '5eq67b1sn7at37cgrhpeqr0vn7', '3.144.136.254', '1747139189', '1747139189', '/product_info.php?info=p18_800277-Einsatz-fuer-E-Futterdaempfer-63-Liter.html')

[XT SQL Error]