The cause must be thrown

FEA: ItEr75S11PreventLooseChanges

navalplanner-webapp/src/main/java/org/navalplanner/web/common/concurrentdetection/ConcurrentModificationHandling.java

@@ -66,7 +66,7 @@ public class ConcurrentModificationHandling {
                         ConcurrentModificationController.showException(
                                 optimisticLockingFailureException, goToPage);
                     }
-                    throw e;
+                    throw cause;
                 }
             }
         };