Currency handling will be automatically converted (see long text)

What causes this issue?

In controlling area &V1&, you are copying from version &V2& to version
&V3&. During this process, the system found that the indicator "All
currencies" is not active in one or more of these versions. In such a
situation, the leading currency for costs and prices can be the
controlling area currency only.
The currency you set as leading currency for costs and/or prices is not
the same as the controlling area currency.

System Response

The system sets the controlling area currency as leading currency for
both the costs and the prices.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.