/known_devices.yaml

Why my discovered devices are poping up so weird? (here i replaced macs with zeroes)

  00_00_00_00_00_00:  
  hide_if_away: true
  icon: mdi:power
  mac: 00:00:00:00:00
  name: 'sonoff_s20'
  picture:
  track: true

But nowhere in doc there was not such as syntax.
How they are become an entities?

What specifically is weird about it? That seems to match mine (i am using gpslogger)…(i replaced my_device_id an person1_name):

my_device_id:
  hide_if_away: false
  icon:
  mac:
  name: person1_name
  picture: /local/avatar_person1.jpg
  track: true
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okay. Would you say something about history tab, how to stop displaying unused things there?

Exclude the unused items:

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