Disappearing personal crystal

[Millerhill92]

I just finished Dantooine and got the crystal, killed the Jedi master and is in getting in my ship to leave I realize My lightsaber has completely changed. The color went from red to purple, my personal crystal along with the other focus crystal in my saber are gone and not in my inventory or any other lightsaber in my inventory. Went back to an old save and it’s not there either, just wondering if anyone has had this problem before and if there’s anything I can do about it