Upgrading from 1.2.x to 1.3.x can be done directly on your instances. This page will list few general details you should take into consideration when running the upgrade.
## Deprecation Notice
## Breaking Changes for 1.3.x Stable Release
## Service Connection Changes
### Airflow Connection
Removed the `MSSQL` connection option from airflow backend database. This is due to the option being experimental and will be deprecated by the Airflow team. For more information refer to the [link](https://airflow.apache.org/docs/apache-airflow/stable/howto/set-up-database.html#choosing-database-backend).
If you are using airflow with `MSSQL` backend, we recommend switching it to the supported backends e.g `MYSQL` or `POSTGRES`.
#### Removed below MSSQL config option from Airflow