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', 'i5m6n8c87mbo9m9oe2vd2k1rf4', '216.73.216.179', '1751417692', '1751417692', '/product_info.php?info=p574_806262-Bruehkessel--Kochkessel-100-Liter--3-kW.html')

[XT SQL Error]