How can I migrate users of existing production apk to newly deployed version at open beta testing environment?

I have very specific requirements wherein I would like to provide our latest version apk access to user through open beta testing and want to stop the version lying on prodcution. Challenge here is how can migrate user from production to beta new version?

Let's say I deploy version 10.1 at open beta and want to migrate existing user which are already using production app. If possible how can I do that?

How can I stop production version as restricting features?