Crash with editor when trying to paint foliage. All foliage was assigned to a DataLayer (Editor), and is spatially loaded enabled on all landscape instances. The scene also included Procedural Foliage Spawner. Assertion failed: !IsValidChecked(ExistingActor) [File:D:\build++UE5\Sync\Engine\Source\…

The Solution for me was to delete the DataLayer containging the foliage.