diff --git a/app/assets/javascripts/app/controllers/_ui_element/tree_select_search.coffee b/app/assets/javascripts/app/controllers/_ui_element/tree_select_search.coffee
index 8116b5522..7022ad61d 100644
--- a/app/assets/javascripts/app/controllers/_ui_element/tree_select_search.coffee
+++ b/app/assets/javascripts/app/controllers/_ui_element/tree_select_search.coffee
@@ -1,6 +1,9 @@
 # coffeelint: disable=camel_case_classes
 class App.UiElement.tree_select_search extends App.UiElement.ApplicationUiElement
-  @render: (attribute, params) ->
+  @render: (localAttribute, params) ->
+
+    # clone original attribute
+    attribute = clone(localAttribute)
 
     # set multiple option
     attribute.multiple = 'multiple'