1366 - Incorrect integer value: '' for column `shop_db3`.`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', '476c932fa9610167523a56720c2c56fe', '3.135.246.193', '1714173881', '1714173881', '/product_info.php?info=p255_Andr--Carol---Silhouetten.html&XTCsid=f88a86bf4ffc9ff2be90f468933efb62')

[XT SQL Error]