luc-pimentel commented on issue #73861:
URL: https://github.com/apache/airflow/issues/73861#issuecomment-6564409577
Reproduced on 3.4.0rc2 and on main (2026-11-01) with a local git repo as a
GitDagBundle and a Dag with one `@task`:
| Step | Call | Result |
| --- | --- | --- |
| commit A, parsed | `POST /dags/{dag_id}/dagRuns` with `bundle_version` A |
200, run succeeded |
| commit B (task body only), parsed | `POST` with `bundle_version` A | 404
"does not have a version for bundle_version A" |
| | `GET` the run from A | `bundle_version` A,
`dag_versions[0].bundle_version` B |
| commit C (adds a task), parsed | `POST` with `bundle_version` B (control)
| 200 |
| | `GET` the run from A | `bundle_version` A,
`dag_versions[0].bundle_version` B |
The dag-run, task-instance and grid responses read the commit from the Dag
version row, which `SerializedDagModel.write_dag` refreshes in place when only
the code changed, while the run stays pinned to its own commit in
`DagRun.bundle_version`.
Fix for the reported commit and source link in #76259. The 404 when
triggering at a commit that was refreshed away is left as is there; #76041
covers that side.
---
Drafted-by: Claude Code (claude-fable-5-1); reviewed by @luc-pimentel before
posting
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