There are multiple esphome config entries with the same unique ID.
The config entries are named 'general-smartplug', 'smartplug-rumpus'.
To fix this error, configure the integration and remove all except one of the duplicates.
I have looked in the ESP dashboard and can’t see where I can edit these IDs (or where to find them).
Clicking on the configuration link listed takes me to the configuration page where it seems I can only prevent the device from performing Home Assistant actions, which is not what I want to happen.
Same problem, but even in the menu of the three dots I can not see duplicates, how to set unique ID make that possible if the next update finds that important. Solution above did help delete them all and let them re-enter. Luckily not all nodes needed deleting, pfffh
Same boat here. Sometimes the warning shows up, and it goes away by itself (not exactly sure when though). Again, I checked, and there are no duplicates.