Unexpected Subitem returned from an API call

Platform discussions monday apps & integrations
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1

Steps to reproduce:
I create a board from scratch. Then I create ONE subitem under one of the items. I fetch the subitem board ID from API.

Then I run a following query:

{
  complexity {
    query
    after
  }
  boards(ids: [6997930813, 6997933818]) {
		type
    items_page(limit: 500) {
      cursor
      items {
        id
        updated_at
        name
				parent_item {
          id
        }
      }
    }
  }
}

This gives me the response:

{
  "data": {
    "complexity": {
      "query": 22032,
      "after": 9966936
    },
    "boards": [
      {
        "type": "sub_items_board",
        "items_page": {
          "cursor": null,
          "items": [
            {
              "id": "6997933892",
              "updated_at": "2020-02-18T13:35:36Z",
              "name": "Subitem",
              "parent_item": null
            },
            {
              "id": "6997934351",
              "updated_at": "2024-07-10T13:21:53Z",
              "name": "aaaa",
              "parent_item": {
                "id": "6997930964"
              }
            }
          ]
        }
      },
      {
        "type": "board",
        "items_page": {
          "cursor": null,
          "items": [
            {
              "id": "6997930964",
              "updated_at": "2024-07-10T13:21:53Z",
              "name": "Item 1",
              "parent_item": null
            },
            {
              "id": "6997930997",
              "updated_at": "2024-07-10T13:21:23Z",
              "name": "Item 2",
              "parent_item": null
            },
            {
              "id": "6997931029",
              "updated_at": "2024-07-10T13:21:24Z",
              "name": "Item 3",
              "parent_item": null
            },
            {
              "id": "6997931119",
              "updated_at": "2024-07-10T13:21:23Z",
              "name": "Item 4",
              "parent_item": null
            },
            {
              "id": "6997931048",
              "updated_at": "2024-07-10T13:21:24Z",
              "name": "Item 5",
              "parent_item": null
            }
          ]
        }
      }
    ]
  },
  "account_id": 12787730
}

As you can see there are TWO subitems under the subitem board, one I created and another one called “Subitem” with no parent.
I see no other way to filter it out than checking, if it is on subitem_board and has no parent. But I don’t really need a parent data on this query and it doubles my query complexity.