Veam just launched v12 for their Veeam Backup & Replication.
We do encourage you to
1. Backup Configuration Catalog
2. Clone the VBR Server & perform a test upgrade on the isolated environment first
3. Identify issues and problems of the upgrade before doing it on the production environment
4. Review the Upgrade checklist :- https://helpcenter.veeam.com/docs/backup/vsphere/upgrade_vbr_byb.html?ver=120
Don't rush to perform an upgrade to the production environment.
You may view on upgrade video on how the upgrade process looks like
Optional to migrate to Postgresql if you're running SQL Server. However, if you're using SQL Express, you may want to try to migrate the database.
Enjoy and Good luck with upgrading to Veeam V12.
Stay tuned for daily releases on new enhancement V12 on my youtube channel