So to start out, I know that per RAW it says that lightsabers can't be sundered. In the case that you give your players something that is way to OP or unintentionally breaks the game during combat, how would you go about "fixing it" without forcibly just taking the lightsaber with some lame reasoning? I want to bring balance to our combat encounters, but I don't want the PC to feel like I am targeting him...just make a hard enough encounter that may do something to "break" half of the double lightsaber so he is left with just 1 side that works going forward.
Backstory: I initially gave my players a kyber crystal that was meant to be high powered, but I thought they would make a normal lightsaber out of it...instead they made a double lightsaber and the PC who uses it constantly uses linked, doing anywhere from 11-25+ damage in a game where the rest of the players just can't do that level of damage on a regular basis which makes it hard to craft difficult enough combat encounters when one person has that kind of damage. I have debated on having it taken/stolen, but I can't think of a way to do so that doesn't seem like I am just picking on him directly and taking back a piece of equipment that I shouldn't have given out in the first place.