Group currency to assign to controlling area

Dear Experts,

1. I want to assign "Group currency" to the currency type for controlling area as mentioned below but system is not allowing me to do, it is showing "Currency USD does not match currency type 30".

2.Earlier in ECC system we assigned "Controlling area currency-20" with USD currency, where as in S/4 HANA "Controlling area currency-20" is not available.

Please let me know the process of controlling area currency  in SAP S/4 HANA.

Thank You