langchain-ai/langgraph · error · InvalidNamespaceError

Invalid namespace label '{label}' found in {namespace}. Name

Error message

Invalid namespace label '{label}' found in {namespace}. Namespace labels cannot contain periods ('.').

What it means

Error "Invalid namespace label '{label}' found in {namespace}. Namespace labels cannot contain periods ('.')." thrown in langchain-ai/langgraph.

Source

Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:1273

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/checkpoint/langgraph/checkpoint/store/base/__init__.py:1273 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/19a4c84eddf41e3e. Report an issue: GitHub.