My system errored on something strange - parts in movie collection contains an entry of the collection itself.

curl --request GET \
     --url 'https://api.themoviedb.org/3/collection/1283061?language=en-US' \
     --header 'accept: application/json'

here is a relevant subset of data:

{
  "id": 1283061,
  "parts": [
    ...
    {
      "adult": false,
      "backdrop_path": null,
      "id": 1283061,
      "poster_path": null,
      "media_type": "collection",
      "original_language": "en"
    }
  ]
}

Should I worry about more cases with this? And how this is even possible :)