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', '7l7hsi5k3772715fqnbhvvcub4', '3.141.28.197', '1746785916', '1746785916', '/product_info.php?info=p30_800420-Knochenmuehle.html')

[XT SQL Error]