You can only change your own jobs.

What causes this issue?

You must have background administrator authorization in order to change
a background job that was scheduled by another user.

System Response

Your changes to the job have not been made.

How to fix this error?

Have your user administrator give you the background administrator
authorization. See the documentation for the <LS>Background Processing
Administrator</><ZV>Batch-Verarbeitung: Batch-Administrator</>
authorization object.

Error message extract from SAP system. Copyright SAP SE.