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', 'e9b55c4fceaae5d2a870789f3e3d525b', '3.147.104.248', '1713903667', '1713903667', '/checkout_shipping.php?XTCsid=f716959fd807bba9b6e004501137d276')

[XT SQL Error]