linax101 commented on issue #8181: Duplicate key value violates unique constraint "task_instance_pkey" error URL: https://github.com/apache/airflow/issues/8181#issuecomment-611169190 I discovered that 1.10.2 is not affected by my problem. I went through several versions going back from 1.10.9 and each one had the same issue until i got to 1.10.2. If I lower the parallelism 1.10.2 does not get the database error, it still gets the error at higher configs of parallelism but somehow the tasks still progresses. Attached are the logs surrounding my attempt at running my test DAG along with the pkey failure error. [airflow.log](https://github.com/apache/airflow/files/4452601/airflow.log)
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