Reversal of receipt routing after the item in the receipt has been processed in the putaway

Hi all,

I have one querry.

 I have processed a purchase order through receipt routing into stock.

After receving into stock the item has been moved to storage location by putaway process.

Now if I want to reverse the receipt routing, how should i do it, as the system is giving me error 

"Receipt Reverse not allowed"

CAUSE: You may not reverse a receipt that has begun the directed
putaway process.
RESOLUTION: You must void the open putaway suggestions
that have been created. (The Putaway Confirmation program,
P4617, may be used to display, void, and confirm open putaway
suggestions.)

So could you advice me..