graphene-django DRF ChoiceField does not work with Graphene-Django

When using SerializerMutation with Graphene-Django 3.0.0b7, DRF's ChoiceField doesn't seem to work correctly:

Two identical enum types (but with different names) are created in the GraphQL schema
Using any of the choices in the mutation input results in an error like"\"foo.BAR\" is not a valid choice."

Reproduction steps:

Clone the demo project:

git clone [email protected]:jmp/graphene-django-enum-example.git

Set up the project:

python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Generate the GraphQL schema:

python manage.py graphql_schema --out schema.graphql

Open schema.graphql and you can see an enum AppDummyFooChoices defined as

enum AppDummyFooChoices {
  """First"""
  FIRST

  """Second"""
  SECOND

  """Third"""
  THIRD
}

In the schema, you can also see a duplicate enum defined as

enum foo {
  """First"""
  FIRST

  """Second"""
  SECOND

  """Third"""
  THIRD
}

Run the project, navigate to http://127.0.0.1:8000/graphql and run the following query:

mutation {
  dummyMutation(input: {
    foo: FIRST
  }) {
    id
    errors {
      field
      messages
    }
  }
}

You will get an error:

{
  "data": {
    "dummyMutation": {
      "id": null,
      "errors": [
        {
          "field": "foo",
          "messages": [
            "\"foo.FIRST\" is not a valid choice."
          ]
        }
      ]
    }
  }
}

Expected behavior:

In the GraphQL schema, there should be only one enum type AppDummyFooChoices.
There should be no error when trying to use the enum value FIRST in the mutation

Related issues: