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', 'a4e3ae3d651ab2a63fe2e1c99e4e1327', '3.144.251.72', '1713448457', '1713448457', '/checkout_shipping.php?XTCsid=cb0ad84d7acc90898c9ea3492fbc1557')

[XT SQL Error]