if I export 'appRouter' instead of 'router' I get error

export const router = t.router({...})

export const appRouter = t.router({...})

export type Router = typeof router;

export type Router = typeof appRouter;

import type { Router } from '$lib/trpc/router';

import type { Router } from '$lib/trpc/appRouter';

import { router } from '$lib/trpc/router';

import { appRouter } from '$lib/trpc/appRouter';

export const handle: Handle = createTRPCHandle({
    appRouter,
    createContext,

export const handle: Handle = createTRPCHandle({
    router,
    createContext,