diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
index b5bcc55cf..a7f47965c 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/tabs/AdvancedAllocationTabCreator.java
@@ -190,9 +190,16 @@ public class AdvancedAllocationTabCreator {
             taskElementDAO.reattach(task);
             allocationResult.applyTo(currentScenario, task);
             taskElementDAO.save(task);
+            makeNewAssignmentsDontPoseAsTransient(task);
             updateParentsPositions(task);
         }
 
+        private void makeNewAssignmentsDontPoseAsTransient(TaskElement task) {
+            for (DayAssignment each : task.getDayAssignments()) {
+                each.dontPoseAsTransientObjectAnymore();
+            }
+        }
+
         private void updateParentsPositions(TaskElement task) {
             TaskGroup current = task.getParent();
             while (current != null) {