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:
module.exports = { generateBuildId: async () => { // You can, for example, get the latest git commit hash here return 'my-build-id' }, }