Welp, this is awkward.

This unintentionally large changeset was caused by a mix of  user error and an edge case in the editing software. 

I usually accumulate changes in Vespucci, then upload them selectively by going into "Search for objects", entering the query `(new or modified or deleted) and inview`, and selecting "Upload elements". This time, however, I got a conflict. I resolved it and tried to upload again - however, at some point (not obvious to me), my selection had been lost, so all my changes were uploaded together.

The issue has been reported to the Vespucci developer.