langchain-ai/langgraph · error · NotImplementedError

{AIO_ERROR_MSG}

Error message

{AIO_ERROR_MSG}

What it means

Error "{AIO_ERROR_MSG}" thrown in langchain-ai/langgraph.

Source

Thrown at libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/__init__.py:592

                stage2_rows = []

        return build_delta_channels_writes_history(
            channels=channels,
            chain_by_ch=chain_by_ch,
            seed_val_by_ch=seed_val_by_ch,
            seeded=seeded,
            stage2_rows=stage2_rows,
            serde=self.serde,
        )

    async def aget_tuple(self, config: RunnableConfig) -> CheckpointTuple | None:
        """Get a checkpoint tuple from the database asynchronously.

        Note:
            This async method is not supported by the SqliteSaver class.
            Use get_tuple() instead, or consider using [AsyncSqliteSaver][langgraph.checkpoint.sqlite.aio.AsyncSqliteSaver].
        """
        raise NotImplementedError(_AIO_ERROR_MSG)

    async def alist(
        self,
        config: RunnableConfig | None,
        *,
        filter: dict[str, Any] | None = None,
        before: RunnableConfig | None = None,
        limit: int | None = None,
    ) -> AsyncIterator[CheckpointTuple]:
        """List checkpoints from the database asynchronously.

        Note:
            This async method is not supported by the SqliteSaver class.
            Use list() instead, or consider using [AsyncSqliteSaver][langgraph.checkpoint.sqlite.aio.AsyncSqliteSaver].
        """
        raise NotImplementedError(_AIO_ERROR_MSG)
        yield

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/__init__.py:592 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/49b730523821c83e. Report an issue: GitHub.