diff --git a/app/DD_PM_WINDREAM/frmFormDesigner.vb b/app/DD_PM_WINDREAM/frmFormDesigner.vb
index c33ed6c..bcf4236 100644
--- a/app/DD_PM_WINDREAM/frmFormDesigner.vb
+++ b/app/DD_PM_WINDREAM/frmFormDesigner.vb
@@ -816,7 +816,7 @@ Public Class frmFormDesigner
                 UpdateSingleValue("VKT_ADD_ITEM", IIf(newValue = True, 1, 0))
 
             Case "PreventDuplicates"
-                UpdateSingleValue("VTK_PREVENT_MULTIPLE_VALUES", IIf(newValue = True, 1, 0))
+                UpdateSingleValue("VKT_PREVENT_MULTIPLE_VALUES", IIf(newValue = True, 1, 0))
 
             Case "DefaultValue"
                 UpdateSingleValue("DEFAULT_VALUE", newValue)