[Bug]: 'Generation' (type=value_error.const; given=ChatGeneration; permitted=('Generation',))

[z-sako]

Current Behavior

def get_hashed_name(name):
    return hashlib.sha256(name.encode()).hexdigest()


def init_gptcache(cache_obj: Cache, llm: str):
    hashed_llm = get_hashed_name(llm)
    init_similar_cache(cache_obj=cache_obj, data_dir=f"similar_cache_{hashed_llm}")



llm = AzureChatOpenAI(deployment_name="gpt-4")
set_llm_cache(GPTCache(init_gptcache))
print(llm([HumanMessage(content="Who is it")]))

The first execution is successful, but after generating the cache, an error occurs when executing again.

pydantic.v1.error_wrappers.ValidationError: 1 validation error for Generation
type
  unexpected value; permitted: 'Generation' (type=value_error.const; given=ChatGeneration; permitted=('Generation',))

It seems that langchain.AzureChatOpenAI does not support

Looking forward to your help, thank you

Expected Behavior

No response

Steps To Reproduce

No response

Environment

langchain          0.0.340
openai             1.3.3
gptcache           0.1.42

Anything else?

No response