FrankYang0529 commented on issue #73658:
URL: https://github.com/apache/airflow/issues/73658#issuecomment-5868221523

   edge3 5.0.0rc1 has a regression from my PR #72048, so I'd hold edge3 for an 
rc2:
   
   - #72048: `[core] parallelism` now takes effect. With `parallelism = 3` and 
six parallel tasks, the RC queues three task instances and leaves three 
scheduled, while 4.3.2 queues all six. But when the scheduler restarts while 
Edge task instances from the previous scheduler are still queued or running, 
the new scheduler crashes on startup with `DetachedInstanceError`, and every 
later restart crashes the same way. The upgrade path hits it too: after a 
scheduler running 4.3.2 queues some Edge tasks and stops, the first scheduler 
start after upgrading to 5.0.0rc1 crashes the same way. I reproduced both cases 
with the RC from PyPI on Airflow 3.3.2
   
   The fix is in #73832.


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