items PERSIST work.

src/engine/gameManager/BuildingManager.java

@@ -833,7 +833,7 @@ public enum BuildingManager {
             item.containerType = Enum.ItemContainerType.INVENTORY;
 
             try {
-                item = DbManager.ItemQueries.ADD_ITEM(item);
+                item = DbManager.ItemQueries.PERSIST(item);
                 itemWorked = true;
             } catch (Exception e) {
                 Logger.error(e);