Hi Team,

1. I am trying to upgrade lava machines with the latest version 2020.10.previously it was running on 2020.08.

After Upgrading with the latest 2020.10 i can see that All machines 2 workers & 1 server went offline. Unable to start services of server/worker due to 
Failed to start lava-master.service: Unit lava-master.service not found.
Failed to start lava-slave.service: Unit lava-slave.service not found.

i have referred following page to upgrade:
https://lava.readthedocs.io/en/latest/admin/basic-tutorials/instance/install/#debian 

2 . I would like to know how to downgrade to previous versions.

I am looking for your kind response !!

Regards
Nagendra S