Content relation field definition has wrong type for selectionContentTypes setting

[bdunogier]

{
  content {
    _types {
      article {
        relatedArticles {
          settings {
            selectionContentTypes
          }
        }
      }
    }

{
  "errors": [
    {
      "debugMessage": "Expected a value of type \"Int\" but received: article",
      "message": "Internal server Error",
      "category": "internal",
      "locations": [
        {
          "line": 7,
          "column": 13
        }
      ],
      "path": [
        "content",
        "_types",
        "article",
        "relatedArticles",
        "settings",
        "selectionContentTypes",
        0
      ],