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6 changes: 6 additions & 0 deletions applications/configure/environment-groups.mdx
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Expand Up @@ -161,6 +161,12 @@ porter env list

This displays a table with each group's name, current version, and last updated time.

## Version History

Every update to an environment group creates a new version. Porter retains the **10 most recent versions** of each environment group; older versions are pruned automatically along with their underlying secret data in your cloud provider's secret manager.

Because applications resolve their environment values against a pinned version of the group, an app that has not redeployed in a long time can fall behind. If a synced application is still pinned to a version older than the 10 most recent, redeploying it will pull values from the current version instead.

## Deleting an Environment Group

Environment groups can be deleted from the **Settings** tab on the environment group's page in the dashboard.
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