generateBuildId
Next.js uses a constant id generated at build time to identify which version of your application is being served. This can cause problems in multi-server deployments when next build is run on every server. In order to keep a consistent build id between builds you can provide your own build id.
Open next.config.js and add the generateBuildId function:
next.config.js module.exports = {
  generateBuildId: async () => {
    // You can, for example, get the latest git commit hash here
    return 'my-build-id'
  },
}