1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '0ed96baef63be3db8d76d8649d902048', '3.14.251.103', '1732183731', '1732183731', '/product_info.php/info/p4019_3D-Reliefkarten-Konfigurator.html?refID=2')

[XT SQL Error]