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', 'kkco4v26m8gh3n38lf981bu886', '3.137.203.53', '1746970893', '1746970893', '/product_info.php?info=p549_802158-Badeofen-Unterofen-einzeln.html')

[XT SQL Error]