GraphQL Nexus Error

System Information
  • Strapi Version: 4.6.1
  • Operating System: Fedora
  • Database: postgresql
  • Node Version: v18.12.1
  • NPM Version: 8.19.2
  • Yarn Version: -

Hi. I have installed GraphQL but I am getting an error.
I followed this document: GraphQL - Strapi Developer Docs

debug: :no_entry: Server wasn’t able to start properly.
error: NEXUS__UNKNOWN__TYPE was already defined and imported as a type, check the docs for extending types