diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index 155103776..6a9009026 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -1003,14 +1003,15 @@ class FfiModel with ChangeNotifier {
             // Notify to switch display
             msgBox(sessionId, 'custom-nook-nocancel-hasclose-info', 'Prompt',
                 'display_is_plugged_out_msg', '', parent.target!.dialogManager);
-            final newDisplay = pi.primaryDisplay == kInvalidDisplayIndex
-                ? 0
-                : pi.primaryDisplay;
-            final displays = newDisplay;
+            final isPeerPrimaryDisplayValid =
+                pi.primaryDisplay == kInvalidDisplayIndex ||
+                    pi.primaryDisplay >= pi.displays.length;
+            final newDisplay =
+                isPeerPrimaryDisplayValid ? 0 : pi.primaryDisplay;
             bind.sessionSwitchDisplay(
               isDesktop: isDesktop,
               sessionId: sessionId,
-              value: Int32List.fromList([displays]),
+              value: Int32List.fromList([newDisplay]),
             );
 
             if (_pi.isSupportMultiUiSession) {