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', 'ce6124f4f94c1a9c3d9f39d76ff4399b', '18.188.152.162', '1713589403', '1713589403', '/product_info.php?language=en&info=p247_Nessun-Dorma.html&XTCsid=3cd37329143049d8f2fab7a46749bac8')

[XT SQL Error]