SAP Message USMD2098 - Changing of master data is no longer possible in edition &1

Diagnosis
The edition has the status Marked for Release or Released.Therefore, you can no longer change the master data in this edition.

System Response
You cannot switch to change mode.

Procedure
If the edition has the status Marked for Release and you want tochange the edition, you need to set the status of the edition to InProcess.
If the edition has the status Released, you can no longer changethis edition.