try this

src/app/routes/login.tsx

@@ -2,6 +2,7 @@ import LoginLayout from "@/features/login/components/layout";
 import LoginFlow from "@/features/login/components/login-flow";
 import { redirect, createFileRoute } from "@tanstack/react-router";
 import z from "zod";
+import { useEffect } from "react";
 
 const loginSearchSchema = z.object({
   stage: z.enum(["code", "name"]).optional(),
@@ -9,6 +10,36 @@ const loginSearchSchema = z.object({
   callback: z.string().optional(),
 });
 
+function LoginComponent() {
+  useEffect(() => {
+    if (typeof window !== 'undefined') {
+      const cookies = document.cookie.split(';');
+      const accessTokenCookies = cookies.filter(c => c.trim().startsWith('sAccessToken='));
+
+      if (accessTokenCookies.length > 0) {
+        console.log('[Login] Clearing old SuperTokens cookies');
+
+        const cookieNames = ['sAccessToken', 'sRefreshToken', 'sIdRefreshToken', 'sFrontToken'];
+        const cookieDomain = (window as any).__COOKIE_DOMAIN__ || undefined;
+
+        cookieNames.forEach(name => {
+          document.cookie = `${name}=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;`;
+
+          if (cookieDomain) {
+            document.cookie = `${name}=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/; domain=${cookieDomain}`;
+          }
+        });
+      }
+    }
+  }, []);
+
+  return (
+    <LoginLayout>
+      <LoginFlow />
+    </LoginLayout>
+  );
+}
+
 export const Route = createFileRoute("/login")({
   validateSearch: loginSearchSchema,
   beforeLoad: async ({ context }) => {
@@ -16,11 +47,5 @@ export const Route = createFileRoute("/login")({
       throw redirect({ to: "/" });
     }
   },
-  component: () => {
-    return (
-      <LoginLayout>
-        <LoginFlow />
-      </LoginLayout>
-    );
-  },
+  component: LoginComponent,
 });