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', '1a75eec54d3aee834b24865c80c93877', '3.145.60.29', '1713549640', '1713549640', '/checkout_shipping.php?XTCsid=9514a1bd93d87b5ffcf98997ef6b3ec7')

[XT SQL Error]