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', 'f8b34e55fb91a43c62ea561f4eaa9605', '3.143.168.172', '1713505241', '1713505241', '/product_info.php?info=p247_Nessun-Dorma.html&XTCsid=8c4102f41ddb20799250c1276e1c9d62')

[XT SQL Error]