Stop the engne and mark the workflow as completed.

def StopProcessing(obj, eng, callbacks, exc_info):
        """Stop the engne and mark the workflow as completed."""
        e = exc_info[1]
        obj.save(status=eng.object_status.COMPLETED,
                 id_workflow=eng.uuid)
        eng.save(WorkflowStatus.COMPLETED)
        obj.log.warning(
            "Workflow '%s' stopped at task %s with message: %s",
            eng.name, eng.current_taskname or "Unknown", e.message
        )
        db.session.commit()

        super(InvenioTransitionAction, InvenioTransitionAction).StopProcessing(
            obj, eng, callbacks, exc_info
        )