**Reproduce on main:**
- Run a DAG
- Rename the DAG
- Wait for dag file processor to remove the deleted DAG and add the new one. (Old Dag should not appear on the home page anymore)
- Go to the Browse DAGRUN page.
- Click on a DagRun of the deleted DAG, as if you want to see the 'details/grid' of that old dag run

More info and screenshots here:
https://github.com/notifications#discussioncomment-6898570

![image](https://github.com/apache/airflow/assets/14861206/7af81643-6278-4d90-a20f-6aa7b259ce59)



"""Clear an arbitrary number of task instances."""
        try:
            count, _ = self._clear_task_instances(
                task_instances=task_instances, session=session, clear_downstream=False
            )
            session.commit()
            flash(f"{count} task instance{'s have' if count > 1 else ' has'} been cleared")
        except Exception as e:
            flash(f'Failed to clear task instances: "{e}"', "error")
        self.update_redirect()
        return redirect(self.get_redirect())
    @action(
        "clear_downstream",
        lazy_gettext("Clear (including downstream tasks)"),
        lazy_gettext(
            "Are you sure you want to clear the state of the selected task"
            " instance(s) and all their downstream dependencies, and set their dagruns to the QUEUED state?"
        ),
        single=False,
    )
    @auth.has_access_dag_entities("PUT", DagAccessEntity.TASK_INSTANCE)
    @provide_session
    @action_logging
    def action_clear_downstream(self, task_instances, session: Session = NEW_SESSION):