Experimental PPR doesn't work with Next.js 15 RC 2

Question

I wanted to try PPR using Next.js 15 RC 2 in my side project (just for fun and learning purposes). But it doesn't seem to recognize I'm using Next.js canary.// next.config.tsimport type { NextConfig } from 'next';

const nextConfig: NextConfig = {
  experimental: {
    ppr: 'incremental',
  },
  //...
};

export default nextConfig;The error:throw new CanaryOnlyError('experimental.ppr');
                  ^

CanaryOnlyError: The experimental feature "experimental.ppr" can only be enabled when using the latest canary version of Next.js.My package.json:"dependencies": {
    //...
    "next": "15.0.0-rc.1",
    "react": "19.0.0-rc-cd22717c-20241013",
    "react-dom": "19.0.0-rc-cd22717c-20241013",
    //...
  },

Great-tailed Grackle · Accepted Answer

OK I've fixed it:Turns out upgrading Next.js from 14 to 15 with codemod: npx @next/codemod@canary upgradedoes not upgrade it to canary. I had to manually upgrade it with this:npm i next@canary react@rc react-dom@rc eslint-config-next@rc

Experimental PPR doesn't work with Next.js 15 RC 2

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