diff --git a/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/FightSettingsUserControlModel.cs b/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/FightSettingsUserControlModel.cs
index 43bd21ce24..3a79f54d47 100644
--- a/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/FightSettingsUserControlModel.cs
+++ b/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/FightSettingsUserControlModel.cs
@@ -119,8 +119,8 @@ public class FightSettingsUserControlModel : TaskViewModel
 
     public string?[] Stages => [Stage1, Stage2, Stage3, Stage4];
 
-    /// <remarks>Try to fix: issues#5742. 关卡选择为 null 时的一个补丁，可能是 StageList 改变后，wpf binding 延迟更新的问题。</remarks>
-    public string _stage1Fallback = ConfigurationHelper.GetValue(ConfigurationKeys.Stage1, string.Empty) ?? string.Empty;
+    // Try to fix: issues#5742. 关卡选择为 null 时的一个补丁，可能是 StageList 改变后，wpf binding 延迟更新的问题。</remarks>
+    private string _stage1Fallback = ConfigurationHelper.GetValue(ConfigurationKeys.Stage1, string.Empty) ?? string.Empty;
 
     private string? _stage1 = ConfigurationHelper.GetValue(ConfigurationKeys.Stage1, string.Empty) ?? string.Empty;