Crossbow glitch for 2nd weapon set

Even though I have enough stats to equip the weapon when I move it to my 2nd weapon set slot it says I don't have enough, I'm certain I have enough because as soon as I remove the weapon I plan to use in my first weapon slot it magically allows me to use said crossbow in my 2nd weapon slot, very bizarre bug... Never mind it's because the rune equipped into the crossbow is limited to 1, in hindsight it should probably allow us the same rune on different weapon sets since at the end of the day it's still a different weapon