Modifie root Acount

HI, I have to change the currency but, it is locked on the root accounts doesnt give the possibility to modifie, any ideia to reverse this situation?

You can only change the currency of ledger (leaf node), not for a group.

i am realize of that but i am not using that currency anymore, it was the test one, it will make complication because will have diferente registe, so there are no way to break that?