diff --git a/ENI2/Controls/ValueMappingsControl.xaml.cs b/ENI2/Controls/ValueMappingsControl.xaml.cs
index 5aeec6c4..27e8aadd 100644
--- a/ENI2/Controls/ValueMappingsControl.xaml.cs
+++ b/ENI2/Controls/ValueMappingsControl.xaml.cs
@@ -69,16 +69,22 @@ namespace ENI2.Controls
 
         private async void DelItem_Click(object sender, RoutedEventArgs e)
         {
-            if (this.dataGridValueMappings.SelectedItem is ValueMapping vm)
+            if (this.dataGridValueMappings.SelectedItems.Count > 0)
             {
-                if (MessageBox.Show($"Are you sure to delete {vm.Key} -> {vm.Value}?", Properties.Resources.textConfirmation, MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.No) ==
-                    MessageBoxResult.Yes)
+                if (MessageBox.Show($"Are you sure to delete the selected values?", Properties.Resources.textConfirmation, MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.No) ==
+                        MessageBoxResult.Yes)
                 {
-                    int result = await DBManagerAsync.DeleteAsync(vm);
-                    if (result == 1)
+                    var selectedItems = new List<ValueMapping>();
+                    foreach(ValueMapping vm in this.dataGridValueMappings.SelectedItems)
+                        selectedItems.Add(vm);
+                    foreach(ValueMapping vm in selectedItems)
                     {
-                        _mappings.Remove(vm);
-                    }
+                        int result = await DBManagerAsync.DeleteAsync(vm);
+                        if (result == 1)
+                        {
+                            _mappings.Remove(vm);
+                        }                        
+                    }                    
                 }
             }
         }
diff --git a/misc/db.sqlite b/misc/db.sqlite
index 2b477aca..d33db637 100644
Binary files a/misc/db.sqlite and b/misc/db.sqlite differ