diff --git a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/datastores/DataStore.h b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/datastores/DataStore.h
index 021d831..03eb0eb 100644
--- a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/datastores/DataStore.h
+++ b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/datastores/DataStore.h
@@ -220,6 +220,12 @@ void DataStore::refreshCache(util::Map<std::string, TrackedRecord<TObject>>& cac
         if (oldIndex != -1)
         {
             TrackedRecord<TObject>& oldRecord = oldCache.getValueAt(oldIndex);
+            if (oldRecord.state == RecordState::MODIFIED)
+            {
+                delete refreshedRecord.data;
+                cache.insert(id, oldRecord);
+                continue;
+            }
             *oldRecord.data = *refreshedRecord.data;
             oldRecord.slotIndex = refreshedRecord.slotIndex;
             oldRecord.state = refreshedRecord.state;