There is no problems when you upgrade from v11 to v12.2 of KSC…
Just do a regular upgrade and check afterwards if you still see the link on the dashboard for managing KSV..
After upgrading KSC, I recommend to install the latest Kaspersky Security Components (126.96.36.1995) >Download (english) here: https://www.kaspersky.com/small-to-medium-business-security/downloads/virtualization-hybrid-cloud?utm_content=downloads
After the installation, please check shortly the policies and tasks… Just to check if still everything looks good
Regarding master image..
Install the latest network agent and Light Agent on the master image… But don’t worry… also the previous one should work.