Now I have mostly MAC adresses and names containing the IP address. The duplications are not gone unfortunatly, and what strikes me as odd is that, previously, I saw hostnames of most devices via fritz-platform. I then did, as suggested, remove Fritz Tools integration, cleared the known-devices.yaml, and restarted HA to then Add Fritz Tools Integration again (note: I did not do a rollback). I did an upgrade, then configured the Fritz Tools, while still having fritz: platform in my configuration.yaml. In terms of duplication, I notice the same on my instance. great set up flow for the new Fritz Tools, cool, thanks.
