In Godot 4.5 beta 6, I have a drag-and-drop situation where the data being moved between nodes is stored using instances of a custom resource. The resource instance is added to a property called data inside a scene called slot.tscn and set to be unique. Multiple slots are then added to the scene tree, and their data instances configured with different values, depending on what data each slot is supposed to hold. When the player drag-and-drops from one slot to another, the resource instances h...