Fiscal year variant not unique in controlling area &1 (&2/&3)

What causes this issue?

The current process requires a unique fiscal year variant for all
selected ledgers and company codes.
For the currently processed ledgers and company codes, fiscal year
variants &V2& and &V3& are relevant.

System Response

The processing is stopped.

How to fix this error?

Ensure a unique fiscal year variant by specifying a ledger group and/or
company code accordingly.

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.