#Readding Matter devices after device reset
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If the bulbs got reset, then you'll have to add them as new devices. Whether or not your automations will continue to work depends on how you set up the automations.
If you used actions which target rooms or entities, then once you re-add the bulb you can add it back to the same room or rename it to the same name, and the automations will keep working
if you used actions which target devices, you'll have to update them to point to the new device (while you're at it, switch them to use entities instead so you don't have to do it again)