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', 'f9d42c1760b79c707d0aa2432a64c872', '216.73.216.20', '1771725503', '1771725503', '/product_info.php?info=p3173_Jemen-Reliefkarte.html')

[XT SQL Error]