At some point (I do not remember exactly when, I believe between 3.0 and 3.1) the channel-types changed. That‘s a very unfortunate decision within openHAB, because there is no way to upgrade existing things (beside deleting and re-adding them). IMO you encounter that issue.
Newly added things should not be affected.
Since you are on openHAB 3.2, you can try my own version:
- uninstall the openHAB deconz binding
- add https://download.smarthomej.org/addons.json as „3rd Party JSON Add-On Service“ (or similar, depends on your language settings)
- install the „SmartHome/J Deconz Binding“
Please let me know if that helps.