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', '935873d4d2e05d31d50c0ed438bb9ec1', '3.138.33.178', '1713552802', '1713552802', '/product_info.php?info=p255_Andr--Carol---Silhouetten.html&XTCsid=2c82651c29181c0e0b67329d45f74355')

[XT SQL Error]