How add index currency (type 50) into Non-Leading ledgers

Hi Experts,

I am creating a new ledger (non-leading L6) and I would like insert the index currency (type 50) but Its not enable this currency to set. Only enable currency types: 40 and 60.

Where I set currency type 50 this new ledger L6 ?

Ps: I already set index currency to country on OY01.

thanks.