Description of the bug:

When sending some specific conversations to gemini-1.5-flash will get finish_reason: 6, and this finish_reason can't be found in official document:

Why is this cause?

Environment details

• OS type and version: Ubuntu
• Python version: 3.11.9
• pip version: 24.0
• package versions:
  google-ai-generativelanguage 0.6.6
  google-api-core 2.19.1
  google-api-python-client 2.137.0
  google-auth 2.32.0
  google-auth-httplib2 0.2.0
  google-generativeai 0.7.2

Code example

GEMINI_MODEL = ChatGoogleGenerativeAI(
    model="gemini-1.5-flash",
    temperature=0,
)
prompt = ChatPromptTemplate.from_template(prompt_tmpl)
chain = prompt | GEMINI_MODEL | StrOutputParser()
response = chain.invoke(prompt_parmas)

Error trace

[2024-07-19 10:51:30,697] [langchain_google_genai.chat_models | line:561 | _response_to_result] [ERROR] - response: candidates {
  index: 0
  finish_reason: 6
}
usage_metadata {
  prompt_token_count: 1961
  total_token_count: 1961
}

Actual vs expected behavior:

No response

Any other information you'd like to share?

No response