You should remove it, or change it's beahvior :
- make it an aura, so it's available for other players
- don't add equipement / spells who buff this ability
- introduce food that grants a long-term luck bonus (maybe a fortune cookie that you can bake from dough and four-leave clover, if you're lucky to find any); in general (haven't played D:OS 2, so maybe it's already solved like that): increase effect duration for food to differentiate it more from potions (may be balanced by penalties, lower effects, rarity and price)
- introduce a crafting recipe for additional (non-replacing) luck bonus on armor
- luck aura could also come from some unique items