how to others Session

I was trying to change a role in PFCG . when i entered into change mode .. it Says this role locked by xyz user and that user is on leave. by mistake he left it in change mode. so how do i kill his secession to allow me into change mode?

if i kill the secession .. is the user will be logged of from the system or only will end his current secession like his pfcg will end ? curious to know

Thanks

SR