Ha, ha, ha!
This is how I’d set up picking keys up (assuming the player overlaps them - but I’d probably use an interface, too):
Assuming the Keys are actors and have the abovementioned enumerator.
So are all of those nodes to be deleted at the top of the Door_BP?
Up to you, they do not serve any purpose in this very solution. Note that this:
Makes no sense. It’s the player that calls…