How to delete empty system?

Not finding this anywhere … I’ve got a bunch of lines that previously were one line exercises, I’ve deleted everything in the lines, but this remains. Using the system track or Bars popover won’t delete them. There seems to be some hidden token that is keeping these alive but I can’t find it, I have Signposts visible but there isn’t anything like a system break.

Engrave

Here’s including some of the previous page

Can you upload your Dorico project, or a cut down version of it that shows the problem?

Bwwaaaaa, never mind, my stupid, checking it over before upload I forgot that when I was doing this there was a food fight over hiding cautionary accidentals. This was before the option of hiding was added, and other than tricks the only way to do it was having each in a different flow. Those are flows, I’ve got a million of them in this exercise workbook … user error never mind!

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