Missing database wp_core_useronline

When i turned on the debug mode in WordPress, i have discovered that one database was missing in dating theme v6.6.5

I guess it is minor but i wanted to notify you

WordPress database error: [Table ‘admin_test3.wp_core_useronline’ doesn’t exist]
SELECT * FROM wp_core_useronline WHERE session=’kjqem6jvc4qu04t4muh0i8b5l3′ LIMIT 1

WordPress database error: [Table ‘admin_test3.wp_core_useronline’ doesn’t exist]
INSERT INTO wp_core_useronline (user_id ,session ,ip ,timestamp) VALUES ( ‘1’, ‘kjqem6jvc4qu04t4muh0i8b5l3’, ‘86.201.217.*’, ‘2014-09-30 08:14:14’);

WordPress database error: [Table ‘admin_test3.wp_core_useronline’ doesn’t exist]
DELETE FROM wp_core_useronline WHERE timestamp < ‘2014-09-30 08:04:14’