Vampire Sim Stuck With Sloppy Drinker Weakness

I've got a vampire sim who I gave the 'Sloppy Drinker' weakness. Decided I didn't like it, so I changed it with the Draught of Reconfiguration. She was fine until I moved her in with my current family. Now she's stuck with the weakness, even though I've changed her powers and weaknesses twice since then. Does anyone know how to fix this?