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', 'on1ep1c2qu3lsce37meh11dbr7', '3.145.158.23', '1746772076', '1746772076', '/product_info.php?info=p52_802370-Huehner-Futterautomat-10-kg.html')

[XT SQL Error]