If I have 30 inventory slots and numbers 1, 9, and 15 have items inside, when I reload the inventory after saving I want those items to still be at 1, 9, and 15. The way my inventory is based off is the item class and stack amount in a slot. So for slots without items I leave the class and stack at nothing but they still must be there as filler inbetween the slots that have items.
I suppose one way I can solve is by having a dummy class, but that wouldn’t be my preference. This warning only appears after my upgrade to 4.14 from 4.12.