jedcunningham commented on code in PR #71696:
URL: https://github.com/apache/airflow/pull/71696#discussion_r3797980606
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airflow-core/src/airflow/models/taskinstance.py:
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@@ -461,10 +492,14 @@ def clear_task_instances(
_recalculate_dagrun_queued_at_deadlines(dr, dr.queued_at, session)
+ # A run with no version of its own has nothing to preserve, so the
latest is all
+ # it can be re-run on. Runs migrated from Airflow 2 are like this,
as are runs
+ # whose version `airflow db clean` has since deleted.
+ use_latest_version = run_on_latest_version or
dr.created_dag_version_id is None
Review Comment:
You're right, and it 404s exactly as you describe. _version_from_dag_run now
falls back to the latest whenever created_dag_version_id is NULL regardless of
bundle_version, mirroring what get_dag_for_run_or_latest_version already does.
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