Creating new items does not refresh the ID cache by creating items on top of each other.

[scriptsengineer]

I believed this line:
database.items.append(item)

It would call the "set" of the database items variable, but it doesn't call.

@export var items : Array[InventoryItem] = []:
	set(new_items):
		items = new_items
		update_items_cache()
	get:
		return items

[scriptsengineer]

Confirming this was my mistake, I'll update to forcibly call cache refresh after adding new items/categories
godotengine/godot#17310

[scriptsengineer]

Fixed with 3cd7b29