Value is only an override

src/engine/db/handlers/dbItemHandler.java

@@ -548,6 +548,11 @@ public class dbItemHandler extends dbHandlerBase {
 
     public boolean UPDATE_VALUE(Item item, int value) {
 
+        // Write 0 if we will not modify the value from template
+
+        if (item.value == item.template.item_value)
+            value = 0;
+
         try (Connection connection = DbManager.getConnection();
              PreparedStatement preparedStatement = connection.prepareStatement("UPDATE `obj_item` SET `item_value`=? WHERE `UID` = ?")) {