diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index efa605e..9f77a8f 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -24,7 +24,7 @@ namespace Elwig.Windows {
                 AreaCommitmentResetButton, AreaCommitmentCancelButton
             };
             RequiredInputs = new Control[] {
-                FbNrInput, YearFromInput, KgInput,
+                FbNrInput, YearFromInput, KgInput, RdInput,
                 GstNrInput, AreaInput, AreaComTypeInput, WineCultivationInput
             };
         }
@@ -281,10 +281,10 @@ namespace Elwig.Windows {
             if (KgInput.SelectedItem is AT_Kg curr_kg) {
                 var rdList = await Context.WbRde.Where(r => r.KgNr == curr_kg.KgNr).OrderBy(r => r.Name).Cast<object>().ToListAsync();
                 rdList.Insert(0, new NullItem());
-                ControlUtils.RenewItemsSource(RdInput, rdList, i => (i as WbRd)?.RdNr);
+                ControlUtils.RenewItemsSource(RdInput, rdList, i => (i as WbRd)?.RdNr, null, ControlUtils.RenewSourceDefault.First);
             } else {
                 var rdList = new object[] { new NullItem() };
-                ControlUtils.RenewItemsSource(RdInput, rdList, i => (i as WbRd)?.RdNr);
+                ControlUtils.RenewItemsSource(RdInput, rdList, i => (i as WbRd)?.RdNr, null, ControlUtils.RenewSourceDefault.First);
             }
             ComboBox_SelectionChanged(sender, evt);
         }