New version of app but would like to keep old version available for older devices

I currently have an app on the Connect IQ store.   I am looking to publish a new version and would like to move to a newer CIQ version to get some new features.   This will cause me to not be able to support some older devices with the newer version.   If i publish a new version with the higher CIQ requirement then it will only be available to those devices.   Is there a way to keep/tag an older version of my app for some of those older devices but have a newer version for different ones.   The only other way i have thought about supporting this is to basically keep my current app but stop development on it and then create what would basically be a new app in the app store for new devices.