langchain-ai/langgraph · error · InvalidNamespaceError

Namespace labels cannot be empty strings. Got {label} in {na

Error message

Namespace labels cannot be empty strings. Got {label} in {namespace}

What it means

Error "Namespace labels cannot be empty strings. Got {label} in {namespace}" thrown in langchain-ai/langgraph.

Source

Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:1277

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:1277 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/48be13d1322d5bfa. Report an issue: GitHub.