Neo4j relation property has any | null type

[Kukiezi]

My setup is:
framework: Nextjs 13 with appdir
db: neo4j
and graphql with "@neo4j/graphql" package to work with graphql in the project.

this is one of my types in the schema:

  type User {
    email: String
    role: Role @relationship(type: "HAS_ROLE", direction: OUT)
    accounts: [Account!]! @relationship(type: "HAS_ACCOUNT", direction: OUT)
    answers: [Answer!]!
      @relationship(type: "CREATED", direction: OUT, properties: "on")
    questions: [Question!]! @relationship(type: "CREATED", direction: OUT)
  }

  type Answer {
    id: ID!
    content: String
    question: Question @relationship(type: "HAS_ANSWER", direction: IN)
    user: User @relationship(type: "CREATED", direction: IN, properties: "on")
  }

  interface on {
    on: DateTime
  }

...

and this is the one query I have currently:

  query GetQuestions($id: Float!) {
    questions(where: { id: $id }, options: { limit: 1 }) {
      content
      webResources {
        title
        url
        type {
          name
        }
      }
      answers {
        content
        user {
          email
        }
        userConnection {
          edges {
            on
          }
        }
      }
    }
  }

this is my Codegen config:

import { CodegenConfig } from "@graphql-codegen/cli";

const config: CodegenConfig = {
  schema: "http://localhost:3000/api/graphql",
  documents: ["src/**/*.tsx"],
  generates: {
    "./src/__generated__/": {
      preset: "client",
      plugins: ["typescript", "typescript-operations", "typescript-resolvers"],
      presetConfig: {
        gqlTagName: "gql",
      },
    },
  },
  ignoreNoDocuments: true,
};

export default config;

when I try to get on from edge userConnection.edges[0].on I get any type.
I believe it comes from graphql.ts generated file:

export type GetQuestionsQuery = { __typename?: 'Query', questions: Array<{ __typename?: 'Question', content?: string | null, webResources: Array<{ __typename?: 'WebResource', title?: string | null, url?: string | null, type?: { __typename?: 'WebResourceType', name?: string | null } | null }>, answers: Array<{ __typename?: 'Answer', content?: string | null, user?: { __typename?: 'User', email?: string | null } | null, userConnection: { __typename?: 'AnswerUserConnection', edges: Array<{ __typename?: 'AnswerUserRelationship', on?: any | null }> } }> }> };

but when I look into AnswerUserRelationship I can see on with type:

export type AnswerUserRelationship = On & {
  __typename?: 'AnswerUserRelationship';
  cursor: Scalars['String'];
  node: User;
  on?: Maybe<Scalars['DateTime']>;
};

export type On = {
  on?: Maybe<Scalars['DateTime']>;
};

Any idea what can I do to get this type correctly in the query? It is quite an issue since I am planning to have quite a few properties on "edges/relations" and it would be great if I can get them with correct type.

Thanks in advance for anyone who can help/guide me.