Error 002-0123
Error 002-0123 happens when either Unique ID, or the chip manufacturer is invalid.
Discussion about error 002-0123
How to fix it:
We'll be using
Sky Army Knife, by
Foxi4
1. Open Sky Army Knife
2. Select latest template file
3. Select the rom that is giving you the error
4. In the "Cart ID" section, change the manufacturer
5. Click "Save to .txt"
6. Open diskwriter, and select our modified template
7. Delete rom from your SD with diskwriter
8. Re-write the rom with the edited template we made
9. Cycle through the games on your sky3ds so that it refreshes
10. Play Game
(If you still get the error, Repeat steps 4 to 9 but change the manufacturer to something DIFFERENT)