Error uniqe ios ID but all working normaly

Installation Home Assistant OS
1

I run hassio on Rpi 3, i have ios app on one mobile phone, also push notification working normaly, but in log i always get error like this

Log Details (ERROR)
Tue Jan 22 2019 21:47:51 GMT+0100 (Srednjeevropski standardni čas)

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/entity_platform.py", line 344, in _async_add_entity
raise HomeAssistantError(msg)
homeassistant.exceptions.HomeAssistantError: Entity id already exists: sensor.unknownhost_battery_state. Platform ios does not generate unique IDs