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', 'ab19cc649b7eb9ee1b008599d9c4e052', '3.144.9.141', '1714048009', '1714048009', '/product_info.php?info=p255_Andr--Carol---Silhouetten.html&XTCsid=8431cc383ca4da55e69d814d1f9a8725')

[XT SQL Error]