Independent pairs not possible to delete

[Razziatype]

Hello, I have an issue regarding a number of independent pairs. By accident I made independent pairs consisting of a letter and the space (I know that KernOn doesn't support kerning to space yet). Now I want to delete them or switch them to Auto but its not possible since the Auto button is not clickable. Can somebody help with htis issue or has ran into it before?

[Razziatype]

No worries I managed to solve it. I couldn't change a single of these pairs to auto but all of them together worked.