[GitHub] [airflow] mrshu commented on issue #13925: Duplicate entry with MySQL backend (AriFlow 2.0.0)

[GitBox <gi...@apache.org>]

mrshu commented on issue #13925:
URL: https://github.com/apache/airflow/issues/13925#issuecomment-769433134


   @gedOHub We ran into a similar issue when trying to switch to Airflow 2.0. 
   
   Our setup seems to be similar to yours -- we also run Airflow in a Docker container. We found out that the problem was that in the `1.x` version that we ran previously we've executed `airflow initdb` on each startup of the Docker container in order to apply the migrations (i.e. to simplify switching to a new version of Airflow).
   
   It seems that in Airflow 2.0 the appropriate command would be `airflow db upgrade` as opposed to `airflow db init`, which ought to really be used just once. Swapping these two commands has fixed the issue for us.
   
   It's a long shot and may not really be the cause of the issue here but I am posting this in here so that others can potentially benefit from it when looking up a similar error message.
   
   cc @Lakeron


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