Valuation area &1 can't use curr.type &2 with real-time conversion

What causes this issue?

You have defined a valuation area for use as an inception run.

System Response

Error, since the valuation method uses a currency type with real-time
conversion

How to fix this error?

If a currency type is updated in real-time, an inception run does not
make sense. If you want to set up a valuation area for an inception run,
you need to specify a currency type that is not updated in real-time. An
inception run is used to create initial values for non-real-time
currencies.
If the valuation area is not for use as an inception run, remove the
inception indicator.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.