Upgrade Proxmox really old version 3.1

kinetica

Member
May 9, 2014
24
1
21
Hi,
I was wondering if is possible to upgrade a production server with Proxmox 3.1-21/93bf03d4 to a new version (until 4.4), with a one year community subscription?
Can I encounter problems after the upgrading? The VM are Windows 2012 and linux Zentyal 3.3
Than you
 

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