Help with owntracks + mqtt + cloudmtt

Hello, how are you ?
First if you’re posting in the wrong place, I’m sorry I’m new to the forum.

Come on, I have the following problem.

Every time I reboot, my devices are duplicated in the known_devices.yaml file.

I can not define an image for each user … and I think this can give me problems in the future.

My configuration is as follows in the file

configuration.yaml

mqtt:
 broker: m12.cloudmqtt.com
 port: XXX
 client_id: homeassistant
 username: xx
 password: xx

device_tracker:
  - platform: owntracks

known_devices.yaml file.

renato_iorifly:
  hide_if_away: false
  icon:
  mac:
  name: Renato
  picture:
  track: false

renato_iphone:
  hide_if_away: false
  icon:
  mac:
  name: Renato
  picture: http: //i.imgur.com/IQmp4Il.jpg
  track: true

juliana_iphone:
  hide_if_away: false
  icon:
  mac:
  name: Juliana
  picture:
  track: true

renato_iorifly:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

renato_iphone:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

juliana_iphone:
  hide_if_away: false
  icon:
  mac:
  name: Juliana
  picture:
  track: true

renato_iorifly:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

renato_iphone:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

juliana_iphone:
  hide_if_away: false
  icon:
  mac:
  name: Juliana
  picture:
  track: true

renato_iorifly:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

renato_iphone:
  hide_if_away: false
  icon:
  mac:
  name: renato
  picture:
  track: true

juliana_iphone:
  hide_if_away: false
  icon:
  mac:
  name: Juliana
  picture:
  track: true

EVERY TIME I RESET HA, all users are re-created.

Should I comment aligns device_tracker: