Maplestory "High Five" Private Showcase

That's a possibility, but I don't think it's random. All the potentials in the data have been changed just as Max stated, though. For example, while 10048 was incEVAr before, it's now incDAMr, and the lines on the items are just references to those, I'm pretty sure, so changing the data they reference should also change the item. Actually, I don't remember what happened with VIP items after they removed the 120+ potential tier, they just reverted to the 70+ tier values, no?

I see. Yes, then that doesn't look random.
And 10048 had a "weapon only" flag tagged onto it?

(Yes to the VIP items question).