Hello together,
I’ve a little Problem after changing my esp8266 model. I have used a esp-07 but because of the flash size I’ve upgraded to a 12e. I changed the board, uploaded it and switched the deice. Now I have 2 devices with same name and enteties in my HA. 
I can’t deactivate one, becasue then the 2nd wound show anymore (enteties get also deactivated, so not avaible anymore).
If I check HA settings, integration, esphome I see 2 with same name. If I look at ESPhome Dashboard, I see only one…
Does anyone has an idea how to get rid of the old device, without loosing data and everythink I’ve set up for it?
Thank you in advance!
Delete the two (same) within the HA integrations and then just add it again. When deleting the two (doubled) integrations you might (not necessary) get a message that you need to restart HA to completely delete the device. You gonna want to do this if you are question before adding it again. 
You will not loose any history of your device by deleting and re-adding it. 
Also there is a esphome category you might want to move your thread there 
🤦 that was way more easy then I thought… Thank you a lot.
Because it was about “hardware”/Integrations/Devices I thought this is right and not directly related to ESPHome. But I try to change it. Thank you.
It is indeed esphome related. Because you changed the hardware a (new) unique device was created which “doubles” your present device because they have the same name.
The same can also happen when you replace (for example a broken) esp and then just “add” it again to HA without deleting the old/dead device.