Hi Zoltan,
This sounds like a duplicate UID issue, maybe this UID “d40051” had been previously used by the doc (UID “d335161”) and that’s why it’s appearing now.
This article can show you how to clear the UID from this document.
I can also help you check this if you can’t verify this is in the API browser, you can send me your repo url in a private message for that.
Thanks.