Making a graphql query field optional and not have it break build.

[siliconchild]

Please help me with making a graphql query field optional and not have it break build.
I tried using createSchemaCustomisation API to write type defentitions. The issue is with the code I wrote is I am having to further define the type ContentfulAsset, if not the field references always return null. To Manually define the type ContentfulAsset is not practical as it a huge nested data type. Is there a way to have Gatsby infer the ContentfulAsset type

exports.createSchemaCustomization = ({ actions }) => {
  const { createTypes } = actions
  const typeDefs = `
        type ContentfulBlog implements Node {
            content: Content!
    }
    type Content {
            raw: String!
            references: [ContentfulAsset]
        }
    `
  createTypes(typeDefs)
}

export const blogPostQuery = graphql`
  query ($slug: String!) {
    blog: contentfulBlog(fields: { slug: { eq: $slug } }) {
      title
      image {
        gatsbyImageData
      }
      content {
        raw
        references {
          ... on ContentfulAsset {
            __typename
            gatsbyImageData(placeholder: BLURRED, formats: [WEBP, PNG])
          }
        }
      }
      fields {
        readingTime {
          text
        }
      }
    }
  }

More information: I am trying to render richText format from contentful which returns the embedded assets as references, and if no embedded image is found within the post then gatsby build breaks. Please help me have the references field set as an optional field. I tried everything I could and cannot seem to fix the issue

[siliconchild]

Found the solution it was to add @link to references
references: [ContentfulAsset] @link(by: "id", from: "references__NODE")