1366 - Incorrect integer value: '' for column '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', '1rch2essc75fdskmnp2bmk16e6', '216.73.216.180', '1766860056', '1766860056', '/index.php?XTCsid=d163dd0fc0b54bf3066f85422c77e00a&cat=c13_Accessoires.html')

[XT SQL Error]