I guess I can't I don't get to work on this full time and this happened a while ago and I have since stopped using kern-on and don't know if it's involved other than the KO_T name

I save my files by date and on the 8th I had 68 kerning pairs that started with KO_T the next day on the 9th I had none. And if I make an adjustment between the Cap T and a glyph after it I can export it but it doesn't save

I did something and deleted my KO_T pairs and now I can't save any kerning with that name on the right of cap T. Any idea why this is?