You can restore deleted locations. For example, a location can be deleted if two roles are merged (see Comparing and merging locations).
To restore a deleted location
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In the menu bar click Data administration > Data Explorer.
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In the Data Explorer navigation, click Locations.
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On the Locations page, click Restore deleted object.
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In the Restore Deleted Object pane, click the location that you want to restore.
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Click Next.
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(Optional) In the Verify actions step, verify the actions to run and deselect the check box in front of any actions that should not be run.
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Click Next.