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', 'cunpshq3h2l3r9qso59261t1f1', '18.191.102.140', '1746972931', '1746972931', '/product_reviews.php?info=p64_800512-Dengelbengel.html')

[XT SQL Error]