Had one SmartStart device on the hub (Zooz ZSE41 Z-Wave contact sensor).
Scanned a Minoston LR outdoor plug (MP24Z) and it was entered in the mobile app SmartStart lise w/the same info as the previously joined device. I did not edit anything in the mobile app.
Didn't cause any harm, but it's a strange experience, and makes you wonder if the previous device will be affected by the current device you're trying to pair, or if the pairing is going wrong and you'll end up w/two copies of the previous device. Just odd.