Audio Interface Not Available; MIDI Port No Longer Exists

The problem: these (& similar) error messages pop up every time I load any of a bunch of songs.

I have… ooh… a hundred or so songs suffering from the same problem, & I can't find a way to fix it be re-saving the songs, since I can't find the devices in preferences to turn them off!

I've scoured the manual looking for a way to deal with this.

I don't have these devices & I don't want to 'remember' them, so it's "thank you goodbye", but it seems if you can't find them in prefs, you can't deselect them — meaning every time you launch one of these songs, the same messages appear. Most of the songs have more than two of these messages, so it gets a bit time-consuming having to okay all the error messages. (And no, I don't want to export everything from a hundred songs & create them again just to fix this ridiculous glitch.)

Here are two typical error messages: