diff --git a/app/models/concerns/with_duplication.rb b/app/models/concerns/with_duplication.rb
index d83d03803db1423e6e1a489741c9a1fab5b1a3d7..4f77ef8d08f0eaf9b5531fd9496168c08b695f67 100644
--- a/app/models/concerns/with_duplication.rb
+++ b/app/models/concerns/with_duplication.rb
@@ -40,6 +40,7 @@ module WithDuplication
     h = heading.duplicate
     h.about = instance
     h.position = heading.position
+    h.parent_id = parent_id
     h.save
 
     heading.blocks.ordered.each do |block|