sunank200 commented on issue #49580:
URL: https://github.com/apache/airflow/issues/49580#issuecomment-2903558193

   > [@dstandish](https://github.com/dstandish) can you expand on why this is a 
problem? Seems reasonable to me that we want to keep the dagversion/serdag for 
tis we have in the system... And while we can soft delete, just not sure its 
worth the complexity.
   
   I think Task instances are your single source of truth for what actually 
ran, when and with what result for a DAG. If you delete the DAG (or its 
version), you wipe out every TaskInstance that pointed at it. That means no 
more execution history for those runs. Is this the right behaviour for the user?


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