text: Title: SQLAlchemy + Flask Tutorial
  Body: Following the tutorial provided at https://docs.graphene-python.org/projects/sqlalchemy/en/latest/tutorial/
  using Python 2.7, ran into an error:
  
  AssertionError: Found different types with the same name in the schema: EmployeeConnection, EmployeeConnection.
  
  Upon investigation, I found the following resource which suggested renaming:
  https://github.com/graphql-python/graphene-sqlalchemy/issues/153
  
  Renaming with a similar pattern of EmployeeNode and DepartmentNode fixed the issue. I have attached the new schema.py as a text file here for reference.
  [schema.txt](https://github.com/graphql-python/graphene/files/2870189/schema.txt)
  
  Does the tutorial need to be updated to fix this issue?
  
  
  