AndresNamm opened a new issue #9271:
URL: https://github.com/apache/airflow/issues/9271


   For example: I have a dag that has successful runs from 2018-2020. I change 
a couple of ETL steps in my dag and would like to rerun the dag for this 
period. It would be intuitive to just delete the existing dag runs in this 
period so the dag runs and the tasks in them would be scheduled again. However, 
based on my current tests when I delete the dag runs, the scheduler will 
schedule the dags again however as the tasks still exist and are successful, 
airflow will mark the 2018-2020 dag runs as successful without rerunning the 
tasks. 


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