Start conversation action stops Google Gen AI on voice PE from being able to respond until current conversation expires

[TheBoxTrot]

The problem

If you use the Start conversation via the action on a voice PE the device will not be able to respond to the request and any other request made to the device after that point with an error in the logs being
(History must start with a user turn.)
Using Google Gemini as the Ai

What version of Home Assistant Core has the issue?

core-2025.4.0b1

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 Generative AI

Link to integration documentation on our website

https://rc.home-assistant.io/integrations/google_generative_ai_conversation

Diagnostics information

Logger: homeassistant.components.assist_pipeline.pipeline
Source: components/assist_pipeline/pipeline.py:1189
integration: Assist pipeline (documentation, issues)
First occurred: 4:28:36 PM (1 occurrences)
Last logged: 4:28:36 PM

Unexpected error during intent recognition
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/assist_pipeline/pipeline.py", line 1189, in recognize_intent
    conversation_result = await conversation.async_converse(
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<8 lines>...
    )
    ^
  File "/usr/src/homeassistant/homeassistant/components/conversation/agent_manager.py", line 117, in async_converse
    result = await method(conversation_input)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/conversation/entity.py", line 49, in internal_async_process
    return await self.async_process(user_input)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/conversation/entity.py", line 62, in async_process
    return await self._async_handle_message(user_input, chat_log)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/google_generative_ai_conversation/conversation.py", line 410, in _async_handle_message
    chat = self._genai_client.aio.chats.create(
        model=model_name, history=messages, config=generateContentConfig
    )
  File "/usr/local/lib/python3.13/site-packages/google/genai/chats.py", line 516, in create
    return AsyncChat(
        modules=self._modules,
    ...<2 lines>...
        history=history if history else [],
    )
  File "/usr/local/lib/python3.13/site-packages/google/genai/chats.py", line 379, in __init__
    super().__init__(
    ~~~~~~~~~~~~~~~~^
        model=model,
        ^^^^^^^^^^^^
        config=config,
        ^^^^^^^^^^^^^^
        history=history,
        ^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.13/site-packages/google/genai/chats.py", line 126, in __init__
    self._curated_history = _extract_curated_history(history)
                            ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/google/genai/chats.py", line 87, in _extract_curated_history
    raise ValueError("History must start with a user turn.")
ValueError: History must start with a user turn.

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response

[home-assistant]

Hey there @tronikos, @IvanLH, mind taking a look at this issue as it has been labeled with an integration (google_generative_ai_conversation) you are listed as a code owner for? Thanks!

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