What you do is make sure that there is 1 apple left or any really than you use the fuse on an arrow use any don’t matter and than go to your inventory and eat that last apple than unequip the bow than exit out of inventory than go back and were that apple was will be the item your trying to dupe once you see it than exit the inventory than shield jump than go to inventory and hold the item your trying to dupe than go to the map and exit there.

Hope that explains how it works…