EPUBLISHCONFLICT 📦 npm

npm ERR! 403 — You cannot publish over the previously published versions: 1.2.3

That version number has already been published (or unpublished) and can’t be reused.

Seen on: npm

Meaning

npm versions are immutable. Bump the version before publishing again.

Common causes

  • Forgot to bump the version
  • CI re-running a publish
  • Unpublished version numbers can’t be reused

⚡ Quick fix

  1. npm version patch (or minor/major) and publish again
  2. Guard CI to publish only when the version changed

Detailed fix by platform

npm

  1. npm version patch && npm publish

How to diagnose

  1. Version — Already on npm (npm view pkg versions)?
  2. Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.

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