diff --git a/frontend/src/hooks/mutation/use-add-mcp-server.ts b/frontend/src/hooks/mutation/use-add-mcp-server.ts
index 9ba2eadf25..25581cbdaf 100644
--- a/frontend/src/hooks/mutation/use-add-mcp-server.ts
+++ b/frontend/src/hooks/mutation/use-add-mcp-server.ts
@@ -57,6 +57,7 @@ export function useAddMcpServer() {
 
       const apiSettings = {
         mcp_config: newConfig,
+        v1_enabled: settings.V1_ENABLED,
       };
 
       await SettingsService.saveSettings(apiSettings);
diff --git a/frontend/src/hooks/mutation/use-delete-mcp-server.ts b/frontend/src/hooks/mutation/use-delete-mcp-server.ts
index 79b3ccd959..42ee01601f 100644
--- a/frontend/src/hooks/mutation/use-delete-mcp-server.ts
+++ b/frontend/src/hooks/mutation/use-delete-mcp-server.ts
@@ -25,6 +25,7 @@ export function useDeleteMcpServer() {
 
       const apiSettings = {
         mcp_config: newConfig,
+        v1_enabled: settings.V1_ENABLED,
       };
 
       await SettingsService.saveSettings(apiSettings);
diff --git a/frontend/src/hooks/mutation/use-update-mcp-server.ts b/frontend/src/hooks/mutation/use-update-mcp-server.ts
index c05b322ba2..7d7b7c9fd4 100644
--- a/frontend/src/hooks/mutation/use-update-mcp-server.ts
+++ b/frontend/src/hooks/mutation/use-update-mcp-server.ts
@@ -59,6 +59,7 @@ export function useUpdateMcpServer() {
 
       const apiSettings = {
         mcp_config: newConfig,
+        v1_enabled: settings.V1_ENABLED,
       };
 
       await SettingsService.saveSettings(apiSettings);