diff --git a/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs b/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs
index e699a78e..d76e26e0 100644
--- a/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs
@@ -165,7 +165,7 @@ namespace ServiceLib.ViewModels
             {
                 return;
             }
-            foreach (var it in SelectedSources)
+            foreach (var it in SelectedSources ?? [SelectedSource])
             {
                 var item = _rules.FirstOrDefault(t => t.id == it?.id);
                 if (item != null)
@@ -186,7 +186,7 @@ namespace ServiceLib.ViewModels
             }
 
             var lst = new List<RulesItem4Ray>();
-            foreach (var it in SelectedSources)
+            foreach (var it in SelectedSources ?? [SelectedSource])
             {
                 var item = _rules.FirstOrDefault(t => t.id == it?.id);
                 if (item != null)
diff --git a/v2rayN/ServiceLib/ViewModels/RoutingSettingViewModel.cs b/v2rayN/ServiceLib/ViewModels/RoutingSettingViewModel.cs
index 8ce7d3a5..bf059948 100644
--- a/v2rayN/ServiceLib/ViewModels/RoutingSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/RoutingSettingViewModel.cs
@@ -256,7 +256,7 @@ namespace ServiceLib.ViewModels
             {
                 return;
             }
-            foreach (var it in SelectedSources)
+            foreach (var it in SelectedSources ?? [SelectedSource])
             {
                 var item = LazyConfig.Instance.GetRoutingItem(it?.id);
                 if (item != null)
diff --git a/v2rayN/ServiceLib/ViewModels/SubSettingViewModel.cs b/v2rayN/ServiceLib/ViewModels/SubSettingViewModel.cs
index 4d7592cb..36f63874 100644
--- a/v2rayN/ServiceLib/ViewModels/SubSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/SubSettingViewModel.cs
@@ -90,7 +90,7 @@ namespace ServiceLib.ViewModels
                 return;
             }
 
-            foreach (var it in SelectedSources)
+            foreach (var it in SelectedSources ?? [SelectedSource])
             {
                 ConfigHandler.DeleteSubItem(_config, it.id);
             }