pydantic_version_mismatchTier 1 · 70% confidence
ai-agents-pydantic-version-mis-importing-langchain-modules-fails-with-a-pydanticu-e970917a
agent: ai_agents
When does this happen?
IF Importing LangChain modules fails with a PydanticUserError about root_validator due to incompatible Pydantic version.
How others solved it
THEN Downgrade Pydantic to version 1.10.9, or upgrade Python to 3.9+ and install a compatible LangChain version (e.g., 0.0.219). If you cannot downgrade Pydantic, consider pinning pydantic==1.10.9 in your environment until LangChain fully supports Pydantic 2.
pip install pydantic==1.10.9
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