diff --git a/modules/itop-config-mgmt-1.0.0/model.itop-config-mgmt.php b/modules/itop-config-mgmt-1.0.0/model.itop-config-mgmt.php
index 8ab040574..954b281fd 100644
--- a/modules/itop-config-mgmt-1.0.0/model.itop-config-mgmt.php
+++ b/modules/itop-config-mgmt-1.0.0/model.itop-config-mgmt.php
@@ -881,7 +881,7 @@ class Group extends cmdbAbstractObject
 		MetaModel::Init_AddAttribute(new AttributeExternalField("owner_name", array("allowed_values"=>null, "extkey_attcode"=>"org_id", "target_attcode"=>"name", "is_null_allowed"=>true, "depends_on"=>array())));
 		MetaModel::Init_AddAttribute(new AttributeText("description", array("allowed_values"=>null, "sql"=>"description", "default_value"=>"", "is_null_allowed"=>true, "depends_on"=>array())));
 		MetaModel::Init_AddAttribute(new AttributeString("type", array("allowed_values"=>null, "sql"=>"type", "default_value"=>"", "is_null_allowed"=>true, "depends_on"=>array())));
-		MetaModel::Init_AddAttribute(new AttributeExternalKey("parent_id", array("targetclass"=>"Group", "jointype"=>null, "allowed_values"=>null, "sql"=>"parent_id", "is_null_allowed"=>true, "on_target_delete"=>DEL_MANUAL, "depends_on"=>array("org_id"))));
+		MetaModel::Init_AddAttribute(new AttributeHierarchicalKey("parent_id", array("allowed_values"=>null, "sql"=>"parent_id", "is_null_allowed"=>true, "on_target_delete"=>DEL_MANUAL, "depends_on"=>array("org_id"))));
 		MetaModel::Init_AddAttribute(new AttributeExternalField("parent_name", array("allowed_values"=>null, "extkey_attcode"=>"parent_id", "target_attcode"=>"name", "is_null_allowed"=>true, "depends_on"=>array())));
 		MetaModel::Init_AddAttribute(new AttributeLinkedSetIndirect("ci_list", array("linked_class"=>"lnkGroupToCI", "ext_key_to_me"=>"group_id", "ext_key_to_remote"=>"ci_id", "allowed_values"=>null, "count_min"=>0, "count_max"=>0, "depends_on"=>array())));