When item X > droped.

[yompa93]

I have 300 mana potions and scripts don't droped potions, why?

Did you change the mana potions to the ones you're using ?
Well, this would also work if the ID is the problem:

Manas = "Great Mana Potion"
ManaID = Item.GetID(Manas)
DropManasAbove = 90
AmountToDrop = 1
 
Module.New('DropPots', function(module)
    if Self.ItemCount(ManaID) > DropManasAbove then
        Self.DropItem(Self.Position().x,Self.Position().y,Self.Position().z, ManaID, AmountToDrop)
    end
    module:Delay(1000,1500)
end)