Not all documents with official document number &1 selected

What causes this issue?

A document with the official document number &V1& is among the
documents that you have selected for transfer posting.
There are further open documents for this official document number that
you have not selected.

System Response

The transfer posting is not executed.

How to fix this error?

Choose all the documents that have the official document number &V1&.

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.