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', '9d58d87ddfff23e7c80b508415862f5f', '18.216.190.167', '1713535142', '1713535142', '/product_info.php?info=p255_Andr--Carol---Silhouetten.html&XTCsid=887fff7384999e8c958f14224ebe6b7c')

[XT SQL Error]