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', '079cd6cf835f83e188014dfe08311215', '3.15.190.144', '1714144736', '1714144736', '/checkout_shipping.php?XTCsid=f88a86bf4ffc9ff2be90f468933efb62')

[XT SQL Error]