diff --git a/LehrerApp.Desktop/ViewModels/Groups/AddGroupDialogViewModel.cs b/LehrerApp.Desktop/ViewModels/Groups/AddGroupDialogViewModel.cs
index 356e17c..c39f5ff 100644
--- a/LehrerApp.Desktop/ViewModels/Groups/AddGroupDialogViewModel.cs
+++ b/LehrerApp.Desktop/ViewModels/Groups/AddGroupDialogViewModel.cs
@@ -55,18 +55,18 @@ public partial class AddGroupDialogViewModel : ObservableObject
     }
 
     [RelayCommand]
-    private bool Save()
+    private void Save()
     {
         // Validierung
         if (string.IsNullOrWhiteSpace(Name))
         {
             ValidationMessage = "Bitte einen Namen eingeben.";
-            return false;
+            return;
         }
         if (GradeLevel is < 1 or > 13)
         {
             ValidationMessage = "Klassenstufe muss zwischen 1 und 13 liegen.";
-            return false;
+            return;
         }
 
         Result = new LearningGroup
@@ -82,7 +82,6 @@ public partial class AddGroupDialogViewModel : ObservableObject
 
         _groups.Save(Result);
         ValidationMessage = "";
-        return true;
     }
 }
 
diff --git a/LehrerApp.Sync/Models/PlainSyncModels.cs b/LehrerApp.Sync/Models/PlainSyncModels.cs
index 2356751..90aec64 100644
--- a/LehrerApp.Sync/Models/PlainSyncModels.cs
+++ b/LehrerApp.Sync/Models/PlainSyncModels.cs
@@ -21,7 +21,7 @@ public class PlainSyncEvent
 /// <summary>
 /// Antwort auf einen Plain-Push.
 /// </summary>
-public class PlainPushResponse
+public record class PlainPushResponse
 {
     public bool Success { get; init; }
     public long ServerSequenceNr { get; init; }