Reversal reason &1 does not exist

What causes this issue?

Reversal reason &V1& is not defined in the table of reversal reasons or
it is not a valid reason for reversing invoicing.

System Response

The system cannot reverse the print document.

How to fix this error?

Enter a valid reversal reason.

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.