Local server setup failed

OSS Product Help LangGraph
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I’m new here, following the article: Run a local server - Docs by LangChain to set up a develop environment.

But when i ran `langgraph dev`, it occurred some error as belows.

➜  agent-test source .venv/bin/activate
(.venv) ➜  agent-test langgraph dev
INFO:langgraph_api.cli:

        Welcome to

╦  ┌─┐┌┐┌┌─┐╔═╗┬─┐┌─┐┌─┐┬ ┬
║  ├─┤││││ ┬║ ╦├┬┘├─┤├─┘├─┤
╩═╝┴ ┴┘└┘└─┘╚═╝┴└─┴ ┴┴  ┴ ┴

- 🚀 API: http://127.0.0.1:2024
- 🎨 Studio UI: https://smith.langchain.com/studio/?baseUrl=http://127.0.0.1:2024
- 📚 API Docs: http://127.0.0.1:2024/docs

This in-memory server is designed for development and testing.
For production use, please use LangGraph Cloud.


Process SpawnProcess-1:
Traceback (most recent call last):
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/_subprocess.py", line 80, in subprocess_started
    target(sockets=sockets)
    ~~~~~~^^^^^^^^^^^^^^^^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/server.py", line 67, in run
    return asyncio_run(self.serve(sockets=sockets), loop_factory=self.config.get_loop_factory())
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/asyncio/runners.py", line 195, in run
    return runner.run(main)
           ~~~~~~~~~~^^^^^^
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/asyncio/base_events.py", line 725, in run_until_complete
    return future.result()
           ~~~~~~~~~~~~~^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/server.py", line 71, in serve
    await self._serve(sockets)
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/server.py", line 78, in _serve
    config.load()
    ~~~~~~~~~~~^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/config.py", line 439, in load
    self.loaded_app = import_from_string(self.app)
                      ~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/uvicorn/importer.py", line 19, in import_from_string
    module = importlib.import_module(module_str)
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_api/server.py", line 27, in <module>
    from langgraph_api.api import meta_routes, routes, user_router
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_api/api/__init__.py", line 12, in <module>
    from langgraph_api.api.assistants import assistants_routes
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_api/api/assistants.py", line 24, in <module>
    from langgraph_runtime.checkpoint import Checkpointer
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_runtime/__init__.py", line 21, in <module>
    backend = importlib.import_module(RUNTIME_PACKAGE)
  File "/Users/yetianxin/.pyenv/versions/3.13.5/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_runtime_inmem/__init__.py", line 1, in <module>
    from langgraph_runtime_inmem import (
    ...<8 lines>...
    )
  File "/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph_runtime_inmem/lifespan.py", line 8, in <module>
    from langgraph.constants import CONF, CONFIG_KEY_STORE
ImportError: cannot import name 'CONFIG_KEY_STORE' from 'langgraph.constants' (/Users/yetianxin/Code/agent-test/.venv/lib/python3.13/site-packages/langgraph/constants.py)

I wonder if i do something wrong in which step?

The version of langchain in my environment as belows:

(.venv) ➜  agent-test python -m pip list | grep -i langgraph
langgraph               1.0.1
langgraph-api           0.2.27
langgraph-checkpoint    3.0.0
langgraph-cli           0.3.3
langgraph-prebuilt      1.0.1
langgraph-runtime-inmem 0.0.10
langgraph-sdk           0.2.9