I suspect that is the clue you need to understand.
Search for that error message and you will see other people have run into similar problems.
The issue seems to be you have multiple devices that have the same sensor name and a previous device is using one of the sensor names you are trying to use on this one.
There is some magic that you need to do to get rid of the old one. Or you could just give it a name you haven’t used before.
They don’t have the same sensor name or sensor ID. If you look at the log it is truncating the sensor name I have done lots of research and have had this working well before. Not sure if there was some weird update.
I updated the server to the August 2026 build. It was using the dec 2025 build. I think it stopped working due to either updates in esphome or home assistant. I was planning to update to the latest and then use the update where you can now show what columns are used to identify the sensor. The os update caused it to work so I’m not going to update that new setting.