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', '3f937a3c460c654ae73093d2b8d02dad', '3.17.203.68', '1714174222', '1714174222', '/product_info.php?info=p255_Andr--Carol---Silhouetten.html&XTCsid=8c4102f41ddb20799250c1276e1c9d62')

[XT SQL Error]