diff --git a/prototype/src/main/java/org/hso/ecommerce/entities/warehouse/WarehouseBookingPositionSlotEntry.java b/prototype/src/main/java/org/hso/ecommerce/entities/warehouse/WarehouseBookingPositionSlotEntry.java
index 766398f..444b921 100644
--- a/prototype/src/main/java/org/hso/ecommerce/entities/warehouse/WarehouseBookingPositionSlotEntry.java
+++ b/prototype/src/main/java/org/hso/ecommerce/entities/warehouse/WarehouseBookingPositionSlotEntry.java
@@ -18,8 +18,7 @@ public class WarehouseBookingPositionSlotEntry {
     @ManyToOne
     public Article article;
 
-    // Can;t do, does not work when created in action.
-    //public int newSumArticles;
+    @NotNull
     public int newSumSlot;
 
     @NotNull