This job is scheduled by a job definition (see long text)

What causes this issue?

You want to delete or change a background job for which
a technical job definition exists in the job repository (transaction
SJOBREPO).

System Response

The background job is scheduled by an hourly
activation job, as defined in the
job repository. Changes made in SM37 have no effect.

How to fix this error?

To remove or change the background job, or its frequency,
use transaction SJOBREPO.

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.