Hi!
I’ve rewritten most of the daikin communication and unique id is a combination of mac-address and sensor type (outside/inside). I’ll investigate more but it seems like your daikin doesn’t report the mac-address correctly.
Or perhaps you have one unit showing up multiple times (that was an old issue that is fixed in upcoming releases).
Is it just a log issue or are you missing devices (check the dev-state page)?
Name is read from the device no matter if it is discovered or added via configuration.yaml. What you are referring to is the fact that entities without unique_id can change entity_id and therefore break automations and gui. Since unique_id is present no you can change name and id from the dev-state page.