You’ll find migrations guides here:
Old official migration guide docs are archived here:
https://github.com/home-assistant/home-assistant.io/blob/0c1e49a5f309715341513cb1bc04fbd3b8ce961c/source/_integrations/zwave_js.markdown#migrating-from-previous-z-wave-implementations
The automatic migration tool had really mixed results. Don’t have high expectations of success.