diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index ee3b583..0990d19 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -170,6 +170,7 @@ namespace Elwig.Windows {
             FbNrInput.Text = (await Context.NextFbNr()).ToString();
             MgNrInput.Text = Member.MgNr.ToString();
             YearFromInput.Text = DateTime.Now.Year.ToString();
+            WineCultivationInput.SelectedIndex = 0;
 
             SetDefaultValue(FbNrInput);
             ValidateRequiredInputs();
@@ -181,7 +182,7 @@ namespace Elwig.Windows {
             ControlUtils.RenewItemsSource(AreaComTypeInput, await Context.AreaCommitmentTypes.OrderBy(v => v.VtrgId).ToListAsync(), i => (i as AreaComType)?.VtrgId);
             var cultList = await Context.WineCultivations.OrderBy(c => c.Name).Cast<object>().ToListAsync();
             cultList.Insert(0, new NullItem());
-            ControlUtils.RenewItemsSource(WineCultivationInput, cultList, i => (i as WineCult)?.CultId);
+            ControlUtils.RenewItemsSource(WineCultivationInput, cultList, i => (i as WineCult)?.CultId, null, ControlUtils.RenewSourceDefault.First);
             await RefreshAreaCommitmentList();
         }
 
@@ -233,7 +234,7 @@ namespace Elwig.Windows {
             a.GstNr = GstNrInput.Text;
             a.Area = int.Parse(AreaInput.Text);
             a.VtrgId = (AreaComTypeInput.SelectedItem as AreaComType)!.VtrgId;
-            a.CultId = (WineCultivationInput.SelectedItem as WineCult)!.CultId;
+            a.CultId = (WineCultivationInput.SelectedItem as WineCult)?.CultId;
             a.Comment = (CommentInput.Text == "") ? null : CommentInput.Text;
 
             EntityEntry<AreaCom>? tr = null;