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', 'f12a2e912abd70a8fc2981f2e5e4a8ac', '216.73.216.3', '1767616273', '1767616273', '/product_info.php?info=p2619_Finnland-Reliefkarte.html')

[XT SQL Error]