dstandish opened a new issue, #58942:
URL: https://github.com/apache/airflow/issues/58942

   ### Body
   
   Current state of partition-oriented cron trigger timetable tries to create 
same run 2 times and crashes the scheduler due to uniqueness constraint 
violation
   
   On branch poc-asset-partitions
   
   Dag 
   ```
   with DAG(
       dag_id="run_a_lot_trigger",
       schedule=CronTriggerTimetable("*/2 * * * *", timezone="UTC", 
partitions=True),
       tags=["partition_schedule"],
   ):
   
       @task(outlets=[asset1])
       def hooray(dag_run: DagRun = None):
           time.sleep(1)
           print(f"partition_key: {dag_run.partition_key}")
   
       hooray()
   ```
   
   ### Committer
   
   - [x] I acknowledge that I am a maintainer/committer of the Apache Airflow 
project.


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