Hi I have transferred my old 3DS to 3DS XL via emunand to emunand. My old 3DS' sysnand is still 4.2 and it can still play ambassador games. I want to sell that 3DS but I'm afraid of something. If somebody who buy that 3DS will update the system, what happens to NNID? Will it appaers again? Because it has downgraded from 9.2.