How to Back Stock in SAP

Dear All,

To cancel the GRN I reverse the consumption after reverse consumption stock was showing in the system as per my reversed entry. That's okay till here. next, I try to cancel the GRN but not canceling. then I removed the stock from the system which was shown after my reversed consumption. I did it without canceling the GRN...Now stock is zero !! Now I want to stock back that was shown after my canceled the material consumption..How does it? pls suggest