TRPC Context type error

import { inferAsyncReturnType } from '@trpc/server';
import * as trpcNext from '@trpc/server/adapters/next';
import { getSession } from 'next-auth/react';
import prisma from '../backend/db/client'
/**
 * Creates context for an incoming request
 * @link https://trpc.io/docs/context
 */
export async function createContext(opts: trpcNext.CreateNextContextOptions) {
  const session = await getSession({ req: opts.req });

  return {
    session,
    prisma
  };
}
export type Context = inferAsyncReturnType<typeof createContext>;

import { TRPCError, initTRPC } from '@trpc/server';
import superjson from 'superjson';
import { type Context } from './context';



// Avoid exporting the entire t-object
// since it's not very descriptive.
// For instance, the use of a t variable
// is common in i18n libraries.
const t = initTRPC.context<Context>().create({
  transformer: superjson,
});

// Base router and procedure helpers
export const router = t.router;
export const procedure = t.procedure;