Error with Home/Away status - please help

Hello,

I just wanted to implement device_tracking in my HA, for this I added the following to configuration_yaml:

i saved the file and wanted to restart HA, but unfortunately i get the following error message directly:

Logger: homeassistant.components.websocket_api.http.connection
Source: components/homeassistant/init.py:170
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 17:31:08 (4 occurrences)
Last logged: 17:43:57

[140460952360944] The system cannot restart because the configuration is not valid: Invalid config for [device_tracker.ping]: [Soravis_mi10] is an invalid option for [device_tracker.ping]. Check: device_tracker.ping->hosts->Soravis_mi10. (See ?, line ?).
[140460952360944] The system cannot restart because the configuration is not valid: Invalid config for [device_tracker.ping]: [host] is an invalid option for [device_tracker.ping]. Check: device_tracker.ping->host. (See ?, line ?).
Traceback (most recent call last):
File “/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py”, line 185, in handle_call_service
await hass.services.async_call(
File “/usr/src/homeassistant/homeassistant/core.py”, line 1495, in async_call
task.result()
File “/usr/src/homeassistant/homeassistant/core.py”, line 1530, in _execute_service
await handler.job.target(service_call)
File “/usr/src/homeassistant/homeassistant/helpers/service.py”, line 733, in admin_handler
await result
File “/usr/src/homeassistant/homeassistant/components/homeassistant/init.py”, line 170, in async_handle_core_service
raise HomeAssistantError(
homeassistant.exceptions.HomeAssistantError: The system cannot restart because the configuration is not valid: Invalid config for [device_tracker.ping]: [Soravis_mi10] is an invalid option for [device_tracker.ping]. Check: device_tracker.ping->hosts->Soravis_mi10. (See ?, line ?).

Unfortunately it is not possible for me to validate the configuration before restarting under Settings → General I do not have this possibility in the Core version.

What am I doing wrong?
Kind regards

From doc