[Pydantic] langchain import Document Error

Error

from llama_index.core.bridge.langchain import Document

위 코드에서 아래와 같은 에러 발생

pydantic.errors.PydanticSchemaGenerationError: Unable to generate pydantic-core schema for typing.AsyncGenerator[str, NoneType]. Set `arbitrary_types_allowed=True` in the model_config to ignore this error or implement `__get_pydantic_core_schema__` on your type to fully support it.

If you got this error by calling handler(<some type>) within `__get_pydantic_core_schema__` then you likely need to call `handler.generate_schema(<some type>)` since we do not call `__get_pydantic_core_schema__` on `<some type>` otherwise to avoid infinite recursion.

For further information visit https://errors.pydantic.dev/2.10/u/schema-for-unknown-type

해결방법

pydantic 버전을 명시해서 패키지를 다운그레이드 했음
pydantic = "2.9.2"

원인

나는 아래와 같이 두 개의 패키지가 업데이트 되면서 에러가 나왔었다

• Updating pydantic-core (2.23.4 -> 2.27.0)
• Updating pydantic (2.9.2 -> 2.10.0)