diff --git a/Elwig/Windows/AdministrationWindow.cs b/Elwig/Windows/AdministrationWindow.cs
index 3449965..b489fa1 100644
--- a/Elwig/Windows/AdministrationWindow.cs
+++ b/Elwig/Windows/AdministrationWindow.cs
@@ -149,10 +149,8 @@ namespace Elwig.Windows {
         }
 
         protected void LockInputs() {
-            foreach (var tb in TextBoxInputs) {
+            foreach (var tb in TextBoxInputs)
                 tb.IsReadOnly = true;
-                tb.Focusable = false;
-            }
             foreach (var cb in ComboBoxInputs)
                 cb.IsEnabled = false;
             foreach (var ccb in CheckComboBoxInputs)
@@ -164,10 +162,8 @@ namespace Elwig.Windows {
         }
 
         protected void UnlockInputs() {
-            foreach (var tb in TextBoxInputs) {
+            foreach (var tb in TextBoxInputs)
                 tb.IsReadOnly = false;
-                tb.Focusable = true;
-            }
             foreach (var cb in ComboBoxInputs)
                 cb.IsEnabled = true;
             foreach (var ccb in CheckComboBoxInputs)
@@ -359,7 +355,7 @@ namespace Elwig.Windows {
         }
 
         protected bool InputLostFocus(TextBox input, ValidationResult res, string? msg = null) {
-            if (!res.IsValid && !IsClosing)
+            if (!res.IsValid && !IsClosing && (IsEditing || IsCreating))
                 System.Windows.MessageBox.Show(res.ErrorContent.ToString(), msg ?? res.ErrorContent.ToString(), MessageBoxButton.OK, MessageBoxImage.Warning);
             return res.IsValid;
         }