Crcy type '10' shouldn't be a freely def. crcy (ledger &1/CoCode &2)

What causes this issue?

Currency type '10' has been set as a freely defined currency in ledger
&V1& / company code &V2& for &V3&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

<DS:TRAN.FINSC_LEDGER>Remove currency type '10'</> from the freely
defined currencies for ledger &V1& / company code &V2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.