langchain-ai/langgraph · error · NotImplementedError

TTL is not supported by {self.__class__.__name__}. Use a sto

Error message

TTL is not supported by {self.__class__.__name__}. Use a store implementation that supports TTL or set ttl=None.

What it means

Error "TTL is not supported by {self.__class__.__name__}. Use a store implementation that supports TTL or set ttl=None." thrown in langchain-ai/langgraph.

Source

Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:921

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:921 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/4e6e36e612e18997. Report an issue: GitHub.