Getting issue 'createIssueDependency' doesn't exist on type 'Mutation'

Zenhub Product Q&A
1

As given in Moving from REST to GraphQL | Zenhub Developers i tried to add dependencies between 2 issue but i am getting error

"errors": [
        {
            "message": "Field 'createIssueDependency' doesn't exist on type 'Mutation'",
            "locations": [
                {
                    "line": 2,
                    "column": 3
                }
            ],

I am trying query

mutation createIssueDependency($createIssueDependencyInput: CreateIssueDependencyInput!) {
  createIssueDependency(input: $createIssueDependencyInput) {
    issueDependency {
      blockedIssue {
        id
        number
        title
        blockingIssues(first: 25) {
          nodes {
            id
            number
            title
          }
        }
      }
      blockingIssue {
        id
        number
        title
        blockedIssues(first: 25) {
          nodes {
            id
            number
            title
          }
        }
      }
    }
  }
}

for your reference.

With Variables

{
“createIssueDependencyInput”: {
“blockedIssue”: {
“repositoryGhId”: 123,
“issueNumber”: 124
},
“blockingIssue”: {
“repositoryGhId”: 123,
“issueNumber”: 124
}
}
}

Let, me know if anything i am doing wrong and solution of this issue.