I'm in ArcPro 3.3.1 and I'm trying to import my data into a new Parcel Type in Parcel Fabric. But I can't run the Append tool because it keeps giving me this error:

I have the whole feature dataset in my map, with editing clearly turned on.

If i turn editing off, the tool gives me a notification saying to turn it back on. And I do. But it still fails.

Any help would be greatly appreciated.