You can easily restore any events you have archived if you need to use them again.
In the left navigation, make sure you are in the Academy Workspace.
When in the Academy Workspace, select Training Admin for all Training Administration options.
Select Manage Training and then select Events.
Filter for the desired type and select Archived in the State filter, and select the event from the list that appears.
Select Unarchive on the right. A confirmation page appears: “Unarchive this event?” — select Unarchive event to confirm.