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', 'b09ca4ab5ac12bf0c04ad19c9a265f47', '216.73.216.20', '1771801515', '1771801515', '/index.php/language/en/cat/c34_Kontinente.html')

[XT SQL Error]