> ## Documentation Index > Fetch the complete documentation index at: https://evalgate.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Publish and roll back a prompt > Promote an approved version, then undo safely. # Publish and roll back a prompt Protected environments resolve approved, exact versions. Rolling back means pointing the alias at a previous approved version — never at a draft. ## Publish a version 1. Open the prompt and pick an approved version. 2. Click **Publish to environment**. 3. Choose the environment (for example, `production`). 4. Confirm. The alias now resolves that exact content hash. A screenshot of the publish dialog with the production environment selected. Publishing is append-only. The previous version stays in history and can be re-pointed to at any time. ## Roll back 1. Open the prompt's **History** tab. 2. Find the last known-good version. 3. Click **Publish to environment** on that version. 4. Confirm. The alias now resolves the older version. A screenshot of the History tab with a previous version being re-published. ## What you cannot do * You cannot edit a published version. Versions are immutable. * You cannot point a protected alias at a draft. * You cannot delete a version that a deployment, evaluation, or trace still references. ## Up next Build the scorer that decides pass/fail: [Create a scorer](../scorers/create-scorer).