6th position glyph

In Guitar Playing Techniques, 6th position seems to have lost its glyph. Is this something that I did by accident? This is 5.1.1, but it was the same in 5.1.

Try clicking the little “revert” icon (the circular arrow) in the action bar at the bottom of the left-hand list. Hopefully that will bring it back.

On trying this suggestion I now realise that these are custom techniques, derived from @andyforrest’s excellent workaround for fret positions and barré positions. I don’t think this has been superseded by new factory techniques, has it? Anyway, with the help of Andy’s instructions here I have managed to replace the missing glyph. Sorry for the false alarm.