List of Subitem IDs on Board returning incorrect amount?!

I am running a query to list only the IDs of all Subitems on a board using the Subitem Board ID and getting more subitems than are actually on the board. Have no idea why. The subitems that should not be in the list have a missing parent id (no parent item). Does anyone know why this is happening and how I can exclude these items within the query?

Here is my query:
{“query”:“\\n{\\n boards(ids: 4126679174) {\\n id\\n name\\n items (limit: 5000){\\n id\\n # name\\n }\\n }\\n}”,“variables”:“”}