Both the in-product documentation and the readme for the zwave binding github state:
If the device attributes show that this device has a valid manufacturer ID, device ID and type, then this is likely the case (eg. you see a label like "Z-Wave node 1 (0082:6015:020D::2.0)"). Even if the device appears to be in the database, some manufacturers use multiple sets of references for different regions or versions, and your device references may not be in the database. In either case, the database must be updated and you should raise an issue to get this addressed.