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', 'd4d486piddu7a7mmolj2nk93n1', '216.73.216.112', '1761689460', '1761689460', '/shop_content.php?coID=5')

[XT SQL Error]