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#11
Just do the same thing you did last time. When you restore the image to the new drive Windows will use the latest one. Don't worry about not having the room. It may write over the last image but you don't need it.
If you are concerned or want to save space, delete the image you made a month ago, then run a new one. That will save space. You don't need to do this, but you can.
This method will work fine for you. I hope this clears things up.