Do not revalidate on clone
@@ -219,7 +219,6 @@ public abstract class CompositeItem extends Item {
copy.subitems = new java.util.ArrayList<>();
for (Item subItem : subitems) {
Item subItemCopy = subItem.clone();
- copy.adding(subItemCopy);
copy.subitems.add(subItemCopy);
}
fixConnexity(copy);
