You can just close/re-open the editor and get rid of those dupes. Working on the Preview Asset while Able has it spawned in the editor is a bit iffy.
Looks like you’re calling GetTargetActors and accessing an invalid index as well. You’ll want to make sure the array has something in it before you access it. The query not finding something is generally due to the actor not responding to overlaps, or you’re checking the wrong collision channel. You can also turn on “Show Collision Queries” in the Ability Editor to see where the query is occurring.