langchain-ai/langgraph · error · ValueError

Graph '{graph_id}' must be a string or a dictionary with a '

Error message

Graph '{graph_id}' must be a string or a dictionary with a 'path' key.

What it means

Error "Graph '{graph_id}' must be a string or a dictionary with a 'path' key." thrown in langchain-ai/langgraph.

Source

Thrown at libs/cli/langgraph_cli/uv_lock.py:802

            if "path" not in data:
                raise ValueError(
                    f"Graph '{graph_id}' must contain a 'path' key if it is a dictionary."
                )
            config["graphs"][graph_id]["path"] = _rewrite_uv_lock_import_path(
                config_path,
                data["path"],
                plan,
                label=f"graph '{graph_id}'",
            )
        elif isinstance(data, str):
            config["graphs"][graph_id] = _rewrite_uv_lock_import_path(
                config_path,
                data,
                plan,
                label=f"graph '{graph_id}'",
            )
        else:
            raise ValueError(
                f"Graph '{graph_id}' must be a string or a dictionary with a 'path' key."
            )


def _update_uv_lock_component_path(
    config_path: pathlib.Path,
    config: Config,
    plan: UvLockPlan,
    *,
    section: str,
    key: str,
    label: str,
) -> None:
    section_config = config.get(section)
    if not isinstance(section_config, dict):
        return

    path_str = section_config.get(key)

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/cli/langgraph_cli/uv_lock.py:802 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/a7e7be446fbe48d0. Report an issue: GitHub.