I made the changes described in the WWDC2023-10154 tutorial that were intended to allow the user to create a new (blank) document. However, every new document contains the "Compiler"/"Grace Hopper" card that was added to the persistent store in the earlier, non-document-based part of the video. I've tried a full clean and clearing derived data but I can't seem to get that card to go away.
What am I missing? How can I make sure that new documents are created without any data?