You cannot shrink this recovery point volume currently. Possible reasons for this are: 1. Windows is currently not allowing ...

You cannot shrink this recovery point volume currently. Possible reasons for this are:
1. Windows is currently not allowing this volume to be shrunk due to the presence of a recovery point segment towards the end of the volume. As older recovery points expire, Windows should be able to shrink the volume. Please retry this operation after a few recovery points have expired.
2. The shrink (considering your intended number of recovery points) will result in negligible disk space gains.