USimpleConstructionScript::FixupRootNodeParentReferences warnings

Steps to reproduce warning:

  1. Create empty blueprint project.
  2. Create “Parent” blueprint based on Actor class.
  3. Create “Child” blueprint based on “Parent” blueprint.
  4. Add “Root” scene and replace DefaultSceneRoot with it in “Parent” blueprint.
  5. Add Cube in “Child” blueprint.
  6. Save and compile all.
  7. Compile “Parent” blueprint and get this warning:

LogBlueprint:Warning: USimpleConstructionScript::FixupRootNodeParentReferences() - Couldn’t find inherited parent component ‘Root’ for ‘Cube’ in BlueprintGeneratedClass ‘REINST_Child_C_126’ (it may have been removed)