homeassistant.components.google_assistant.error.SmartHomeError: ArmLevel missing

[Ninja-ca]

The problem

Dears,

I noticed the alarm panel on my Google Assistant Hub UI is unavaiable. Checking logs it seems that some "last_code" are missing, I've identified two codes:

• "OA": Automatic opening -> System has disarm automatically
• "OP": Opening report -> Account was disarmed

Thank you in advance!

What version of Home Assistant Core has the issue?

core-2026.2.1

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Google Assistant

Link to integration documentation on our website

https://www.home-assistant.io/integrations/google_assistant/

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Registrador: homeassistant.components.google_assistant.smart_home
Fuente: components/google_assistant/smart_home.py:181
integración: Google Assistant ([documentación](https://www.home-assistant.io/integrations/google_assistant), [problemas](https://github.com/home-assistant/core/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+google_assistant%22))
Ocurrió por primera vez: 12:07:23 (1 ocurrencia)
Última vez registrado: 12:07:23
Unexpected error serializing query for <state alarm_control_panel.ajax_alarma_alarma=disarmed; code_format=None, changed_by=None, code_arm_required=True, last_zone=1, **last_code=OA**, last_message=0, last_id=None, last_timestamp=2026-02-09T06:00:16+00:00, friendly_name=Ajax Alarma - Alarma, supported_features=0 @ 2026-02-09T07:00:02.142869+01:00>

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/google_assistant/smart_home.py", line 181, in async_devices_query_response
    devices[devid] = entity.query_serialize()
                     ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/components/google_assistant/helpers.py", line 697, in query_serialize
    deep_update(attrs, trt.query_attributes())
                       ~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/components/google_assistant/trait.py", line 1685, in query_attributes
    "currentArmLevel": self._default_arm_state(),
                       ~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/components/google_assistant/trait.py", line 1653, in _default_arm_state
    raise SmartHomeError(ERR_NOT_SUPPORTED, "ArmLevel missing")
homeassistant.components.google_assistant.error.SmartHomeError: ArmLevel missing

Additional information

No response

[home-assistant]

Hey there @home-assistant/cloud, mind taking a look at this issue as it has been labeled with an integration (google_assistant) you are listed as a code owner for? Thanks!

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@Ninja-ca Thanks for reporting this issue!

Before we dive in, please make sure this isn't a duplicate by searching through existing issues. Also check recently closed issues, as your problem might already be fixed but not yet released.

https://github.com/home-assistant/core/issues?q=%20label%3A%22integration%3A%20google_assistant%22%20
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