Function name collision with parent class or duplicate

Why: You created a function named '{fn}' that conflicts with one already defined — either by the parent class (which you should Override instead) or another function in this same Blueprint.

Fix: If you meant to override a parent function: delete your function, then right-click in My Blueprint → Override Function → pick '{fn}' from the list. If you meant a separate function: rename yours to something unique (e.g. '{fn}_Custom').