{"record":{"id":"26a82629a0bf2294","repo":"langchain-ai/langgraph","slug":"invalid-namespace-label-label-namespace-label","errorCode":null,"errorMessage":"Invalid namespace label '{label}'. Namespace labels cannot contain periods ('.').","messagePattern":"Invalid namespace label '(.+?)'\\. Namespace labels cannot contain periods \\('\\.'\\)\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"libs/sdk-py/langgraph_sdk/_async/store.py","lineNumber":73,"sourceCode":"            params: Optional query parameters to include with the request.\n\n        Returns:\n            `None`\n\n        ???+ example \"Example Usage\"\n\n            ```python\n            client = get_client(url=\"http://localhost:2024\")\n            await client.store.put_item(\n                [\"documents\", \"user123\"],\n                key=\"item456\",\n                value={\"title\": \"My Document\", \"content\": \"Hello World\"}\n            )\n            ```\n        \"\"\"\n        for label in namespace:\n            if \".\" in label:\n                raise ValueError(\n                    f\"Invalid namespace label '{label}'. Namespace labels cannot contain periods ('.').\"\n                )\n        payload = {\n            \"namespace\": namespace,\n            \"key\": key,\n            \"value\": value,\n            \"index\": index,\n            \"ttl\": ttl,\n        }\n        await self.http.put(\n            \"/store/items\", json=_provided_vals(payload), headers=headers, params=params\n        )\n\n    async def get_item(\n        self,\n        namespace: Sequence[str],\n        /,\n        key: str,","sourceCodeStart":55,"sourceCodeEnd":91,"githubUrl":"https://github.com/langchain-ai/langgraph/blob/38031739e551638e373fb553453256c23feeb41f/libs/sdk-py/langgraph_sdk/_async/store.py#L55-L91","documentation":"Error \"Invalid namespace label '{label}'. Namespace labels cannot contain periods ('.').\" thrown in langchain-ai/langgraph.","triggerScenarios":"Thrown at libs/sdk-py/langgraph_sdk/_async/store.py:73 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"38031739e551638e373fb553453256c23feeb41f","analyzedAt":"2026-08-26T18:02:49.312Z","schemaVersion":2},"datasetVersion":"2026-08-26T21:11:00.512Z"}