diff --git a/ webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/ConcurrencyCart.java b/ webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/ConcurrencyCart.java
index 49734389b..389e13e0f 100644
--- a/ webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/ConcurrencyCart.java	
+++ b/ webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/ConcurrencyCart.java	
@@ -120,7 +120,6 @@ public class ConcurrencyCart extends LessonAdapter
     	}
     	catch (ParameterNotFoundException pnfe)
     	{
-    		pnfe.printStackTrace();
     		System.out.println("[DEBUG] no action selected, defaulting to createShoppingPage");
     		ec = createShoppingPage(s, quantity1, quantity2, quantity3, quantity4);
     	}