Update 090-nextjs.mdx

content/800-guides/090-nextjs.mdx

@@ -269,10 +269,10 @@ Now, add the following code to your `lib/prisma.ts` file:
 import { PrismaClient } from '@prisma/client'
 import { withAccelerate } from '@prisma/extension-accelerate'
 
-const prisma = new PrismaClient().$extends(withAccelerate())
-
 const globalForPrisma = global as unknown as { prisma: typeof prisma }
 
+const prisma = globalForPrisma.prisma || new PrismaClient().$extends(withAccelerate())
+
 if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma
 
 export default prisma
@@ -284,11 +284,11 @@ This file creates a Prisma Client and attaches it to the global object so that o
 
 If you're not using Prisma Postgres, replace the line
 ```ts
-const prisma = new PrismaClient().$extends(withAccelerate())
+const prisma = globalForPrisma.prisma || new PrismaClient().$extends(withAccelerate())
 ```
 with
 ```ts
-const prisma = new PrismaClient()
+const prisma = globalForPrisma.prisma || new PrismaClient()
 ```
 and remove the `@prisma/extension-accelerate` import.
 
@@ -740,4 +740,4 @@ For more information and updates:
 - [Prisma Client API reference](/orm/prisma-client)
 - [Next.js documentation](https://nextjs.org/docs)
 - Join our [Discord community](https://discord.com/invite/prisma)
-- Follow us on [Twitter](https://twitter.com/prisma)
+- Follow us on [Twitter](https://twitter.com/prisma)