# FAQ
Frequently asked questions about self-managed deployments.
## How long do license keys last?

Community edition license keys are valid for one year. Enterprise license
keys will vary based on the terms of your contract.

## How do I get a license key?


| License key type | Deployment type | Action |
| --- | --- | --- |
| Community | New deployments | <p>To get a license key:</p> <ul> <li>If you have a Cloud account, visit the <a href="https://console.materialize.com/license/" ><strong>License</strong> page in the Materialize Console</a>.</li> <li>If you do not have a Cloud account, visit <a href="https://materialize.com/self-managed/community-license/" >https://materialize.com/self-managed/community-license/</a>.</li> </ul> |
| Community | Existing deployments | Contact <a href="https://materialize.com/docs/support/" >Materialize support</a>. |
| Enterprise | New deployments | Visit <a href="https://materialize.com/self-managed/enterprise-license/" >https://materialize.com/self-managed/enterprise-license/</a> to purchase an Enterprise license. |
| Enterprise | Existing deployments | Contact <a href="https://materialize.com/docs/support/" >Materialize support</a>. |


## How do I add a license key to an existing installation?

The license key should be configured in the Kubernetes Secret resource
created during the installation process. To configure a license key in an
existing installation, run:

```bash
kubectl -n materialize-environment patch secret materialize-backend -p '{"stringData":{"license_key":"<your license key goes here>"}}' --type=merge
```

## How can I downgrade Self-Managed Materialize?

Downgrading is not supported.