jedcunningham opened a new pull request, #29207:
URL: https://github.com/apache/airflow/pull/29207

   The recent postgres subchart upgrade had some issues.
   
   The biggest was the upgrade from PG 11 -> 15 resulted in the default 
`password_encryption` switching from `md5` to `scram-sha-256`. Simply moving 
back to 11 is the easiest remediation, and is acceptable since it is the oldest 
version Airflow supports (as of today in 2.5).
   
   Additionally, when updating the subchart, updating existing releases using 
built-in postgres were breaking. As production use cases shouldn't be using 
built-in postgres, and it's easy to work around when hit, I've just documented 
the steps to proceed with the upgrade.
   
   


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