For reservation & &, no movements can be posted

What causes this issue?

No goods movements can be posted for the reservation item specified.
Possible reasons for this are:
- The reservation item has been deleted
- The order which created the reservation has been deleted or has been
marked for deletion.
- The wrong reservation number has been submitted.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.