If you have already added the new device to your zwave network, you can stop HA, backup your zwcfg xml file and carefully make the edits to match the 1.6 version of the device specific xml file. I’ve done this in the past and it seemed to work OK.
Unfortunately, I am on the road this for the next couple of days but if you are still looking on Friday, I will get something posted… What I did is look for some of the entries in the xml file and add/modify those portions. I may have posted some previous examples if you want to search (way) back on the forum.