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', 'p8svbt73bhiqi0gqoljc1ugmc0', '18.97.9.171', '1747712168', '1747712168', '/product_info.php?info=p596_800987-Kochkesseleinsatz-Edelstahl-100-l--ohne-Auslauf.html')

[XT SQL Error]