opendj-server-legacy/src/main/java/org/opends/guitools/controlpanel/ui/CustomObjectClassPanel.java
@@ -477,7 +477,7 @@ updateAttributesWithParent(false); for (AttributeType attr : oc.getRequiredAttributes()) for (AttributeType attr : oc.getDeclaredRequiredAttributes()) { availableModel.remove(attr); modelRequired.add(attr);