Version

5.0.0-alpha.2

Environment info

System:
    OS: Windows 10 10.0.19042
    CPU: (8) x64 Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
  Binaries:
    Node: 15.5.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 2.4.0 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 7.3.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: Not Found
    Edge: Spartan (44.19041.423.0), Chromium (87.0.664.66), ChromiumDev (89.0.752.1)

Steps to reproduce

yarn global add @vue/cli@next
vue ui

What is expected?

normal operation.

What is actually happening?

Error: Cannot use GraphQLSchema "[object GraphQLSchema]" from another module or realm.

Ensure that there is only one instance of "graphql" in the node_modules
directory. If different versions of "graphql" are the dependencies of other
relied on modules, use "resolutions" to ensure only one version is installed.

https://yarnpkg.com/en/docs/selective-version-resolutions

Duplicate "graphql" modules cannot be used at the same time since different
versions may have different capabilities and behavior. The data from one
version used in the function from another could produce confusing and
spurious results.