I think this is a bug but not sure.
I have repair Serious wounds in my arty which is a permanent in book spell. I dragged Inflict seriuos wounds to another slot as well for a particular quest. Now it wont let me drag either spell from my book as it says their permanent.
How do i drag inflict out as i never use it, repair is my permanent book spell, only had this issue after dragging repair in at a later date.