Originator can't delete a vacant (erroneous) taxon

In a flag for the misspelled taxon “Clemensia ludovici”, I suggested that it could now be deleted, but the originator indicates that action can’t be done because, “You can only delete taxa you created that aren’t associated with taxon changes, identifications, or other content”.

The erroneous taxon has no observations and no proposed taxon changes.

What is preventing the originator (@atronox) from deleting it? The open flag?

There is this ID:

https://www.inaturalist.org/observations/142535424