{"record":{"id":"120ac7a0aebf971b","repo":"BerriAI/litellm","slug":"a-toolset-named-payload-toolset-name-already-e","errorCode":null,"errorMessage":"A toolset named '{payload.toolset_name}' already exists.","messagePattern":"A toolset named '(.+?)' already exists\\.","errorType":"http","errorClass":"HTTPException","httpStatus":409,"severity":"error","filePath":"litellm/proxy/management_endpoints/mcp_management_endpoints.py","lineNumber":2843,"sourceCode":"        \"\"\"Create a named toolset — a curated selection of {server_id, tool_name} pairs.\"\"\"\n        prisma_client: Final = get_prisma_client_or_throw(\"Database not connected. Connect a database to your proxy\")\n        if LitellmUserRoles.PROXY_ADMIN != user_api_key_dict.user_role:\n            raise HTTPException(\n                status_code=status.HTTP_403_FORBIDDEN,\n                detail={\"error\": \"Only proxy admins can create MCP toolsets.\"},\n            )\n        touched_by: Final = (\n            get_audit_log_changed_by(\n                litellm_changed_by=litellm_changed_by,\n                user_api_key_dict=user_api_key_dict,\n                litellm_proxy_admin_name=LITELLM_PROXY_ADMIN_NAME,\n            )\n            or LITELLM_PROXY_ADMIN_NAME\n        )\n        try:\n            result: Final = await create_mcp_toolset(prisma_client, payload, touched_by)\n        except UniqueViolationError:\n            raise HTTPException(\n                status_code=status.HTTP_409_CONFLICT,\n                detail={\"error\": f\"A toolset named '{payload.toolset_name}' already exists.\"},\n            )\n        from litellm.proxy._experimental.mcp_server.mcp_server_manager import (\n            global_mcp_server_manager,\n        )\n\n        global_mcp_server_manager.invalidate_toolset_cache()\n        return result\n\n    @router.get(\n        \"/toolset\",\n        description=\"List MCP toolsets accessible to the calling key\",\n    )\n    @management_endpoint_wrapper\n    async def fetch_mcp_toolsets(\n        user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),\n    ):","sourceCodeStart":2825,"sourceCodeEnd":2861,"githubUrl":"https://github.com/BerriAI/litellm/blob/77b7c6c40c0c5aa5fbcb1d6a1825ac39ca8829b8/litellm/proxy/management_endpoints/mcp_management_endpoints.py#L2825-L2861","documentation":"Uniqueness guard on toolset creation: the DB raised UniqueViolationError because a toolset with the same toolset_name already exists; the endpoint converts it to HTTP 409 with the offending name interpolated.","triggerScenarios":"Thrown at litellm/proxy/management_endpoints/mcp_management_endpoints.py:2843 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Choose a different toolset_name, or update the existing toolset instead."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"77b7c6c40c0c5aa5fbcb1d6a1825ac39ca8829b8","analyzedAt":"2026-08-18T11:44:31.656Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}