Runtime Error in blog template

[harihar-nautiyal]

After initialization of blog template in solutions/blog
getting this runtime error -

➜ blog git:(main) ✗ npm run dev

dev
next dev

▲ Next.js 15.2.4

• Local: http://localhost:3000
• Network: http://192.168.29.75:3000

✓ Starting...
✓ Ready in 1417ms
○ Compiling /blog/[slug] ...
✓ Compiled /blog/[slug] in 957ms (779 modules)
⨯ [Error: A React Element from an older version of React was rendered. This is not supported. It can happen if:

• Multiple copies of the "react" package is used.
• A library pre-bundled an old copy of "react" or "react/jsx-runtime".
• A compiler tries to "inline" JSX instead of using the runtime.] {
  digest: '233309895'
  }
  GET /blog/vim 500 in 2037ms

I didn't touched the code just copied as suggested by
here.

[devdass]

Same issue

[harihar-nautiyal]

should I resolve it by migrating it to new version?

[lordkerwin]

I managed to fix this by updating the package.json to use

    "next": "15.3.0",
    "next-mdx-remote": "5.0.0",
    "postcss": "^8.5.3",
    "react": "19.1.0",
    "react-dom": "19.1.0",

And it seems happy now