See open-metadata/OpenMetadata@69c9102 from refs/heads/main

content/partials/v1.6/deployment/upgrade/upgrade-prerequisites.md

@@ -103,6 +103,18 @@ After the migration is finished, you can revert this changes.
 
 # Backward Incompatible Changes
 
+## 1.6.4
+
+### Airflow 2.9.3
+
+We are upgrading the Ingestion Airflow version to 2.9.3.
+
+The upgrade from the existing 2.9.1 -> 2.9.3 should happen transparently. The only thing to note is that there's
+an ongoing issue with Airflow migrations and the `pymysql` driver, which we used before. If you are specifying
+on your end the `DB_SCHEME` environment variable in the ingestion image, make sure it now is set to `mysql+mysqldb`.
+
+We have updated the default values accordingly.
+
 ## 1.6.2
 
 ### Executable Logical Test Suites