How to create child in contentful?

Hi! Hope you guys have good friday so far.

I have a website written in gatsby that grabs some copy from contentful, I'm having some difficulties with graphql query which has child in it, and I'm not entirely sure how to approach to that on contentful side, could anybody help me?

My graphql query:

 query HeadingQuery {
          allContentfulCareer(filter: { active: { eq: true } }) {
            edges {
              node {
                childContentfulCareerDescriptionTextNode {
                  childMarkdownRemark {
                    html
                  }
                }
                title
                location
              }
            }
          }
        }

But I'm getting an error:

Unknown field 'childContentfulCareerDescriptionTextNode' on type 'ContentfulCareer'. Source: document `HeadingQuery` file: `GraphQL request Any ideas?