Upgrade from/to unofficial build (for example various ppa) is not supported. For upgrade cinnamon from/to other repository a remove (or purge in some cases) of cinnamon and all related packages installed before the upgrade is needed.
Upgrade from/to unofficial build (for example various ppa) is not supported.
For upgrade cinnamon from/to other repository a remove (or purge in some cases) of cinnamon and all related packages installed before the upgrade is needed.