> ## Documentation Index
> Fetch the complete documentation index at: https://serval-hannah-docs-custom-access.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Workflow Versioning

> Learn how to manage and restore different versions of your workflows

# Workflow Versioning

Serval automatically tracks all published versions of your workflows, allowing you to view historical changes and restore previous versions when needed.

## Viewing Workflow Versions

Once you've published changes to a workflow, you can access its version history by clicking the **Latest version** button next to the run button in the top right corner of the workflow builder.

<img src="https://mintcdn.com/serval-hannah-docs-custom-access/FsvE6zt-b38NXDfO/images/serval-docs/workflows/versioning/versioning-base-image.png?fit=max&auto=format&n=FsvE6zt-b38NXDfO&q=85&s=19bca2e4adb6d4a5b7db873cadc71195" alt="Workflow builder with version button highlighted" width="2916" height="1906" data-path="images/serval-docs/workflows/versioning/versioning-base-image.png" />

Clicking this button opens a sidebar displaying all historical versions of your workflow, including:

* Version numbers
* Publication dates and times
* Who published each version

<img src="https://mintcdn.com/serval-hannah-docs-custom-access/FsvE6zt-b38NXDfO/images/serval-docs/workflows/versioning/versioning-clicked.png?fit=max&auto=format&n=FsvE6zt-b38NXDfO&q=85&s=26fa0a47f44502cfcbd8837dd92eb244" alt="Version history sidebar opened" width="2922" height="1926" data-path="images/serval-docs/workflows/versioning/versioning-clicked.png" />

## Restoring Previous Versions

If you need to revert to an earlier version of your workflow, you can easily restore it:

1. Click on the version you want to restore from the version history sidebar
2. The selected version will load in the builder, and you'll see a **Restore** button in place of the usual Publish button

<img src="https://mintcdn.com/serval-hannah-docs-custom-access/FsvE6zt-b38NXDfO/images/serval-docs/workflows/versioning/old-verision-selected-restore-button.png?fit=max&auto=format&n=FsvE6zt-b38NXDfO&q=85&s=332a054b546eb268aba0e78843114ed8" alt="Old version selected with restore button visible" width="2914" height="1130" data-path="images/serval-docs/workflows/versioning/old-verision-selected-restore-button.png" />

3. Click the **Restore** button to create a new version based on the selected historical version

## Working with Restored Versions

When you restore a previous version:

* A new version is created at the top of the version list
* This new version is identical to the historical version you selected
* You can either publish it immediately or make additional modifications before publishing

<img src="https://mintcdn.com/serval-hannah-docs-custom-access/FsvE6zt-b38NXDfO/images/serval-docs/workflows/versioning/restored-version-ready-to-publish.png?fit=max&auto=format&n=FsvE6zt-b38NXDfO&q=85&s=2f38b09a7eb0d670b1eb4437d4dda8db" alt="Restored version ready to publish" width="1952" height="890" data-path="images/serval-docs/workflows/versioning/restored-version-ready-to-publish.png" />

<Note>
  Restoring a version doesn't delete or overwrite any existing versions. It creates a new version based on the historical one, preserving your complete version history.
</Note>

## Best Practices

* **Regular Publishing**: Publish your workflow changes regularly to maintain a comprehensive version history
* **Version Notes**: Consider adding descriptive names or comments to significant versions for easier identification
* **Testing**: Always test restored versions before publishing to ensure they still work as expected with any system changes