Hello Subbu,
I remember getting this status, when we tried to remove privileges that had the status "Pending". After saving and a refresh (we tried that through the UI) they changed to "Not allowed". They weren't part of an approval process though. Just waiting for other stuff to happen that didn't and when we tried to get rid of them to start anew, that status changed and was stuck.
But it's so long ago, I don't know how we fixed that. 
Regards,
Steffi.