There is the ability to archive a PI Planning session. This allows you to cleanup the list of available sessions to choose for users in the app (and also to admins in the cockpit).
Archiving a session stops the sync with the ALM tool (you can start the sync at anytime after un-archiving)
A archived session can be un-archived
Archived sessions can still be accessed in the app (but they are hidden by default)
Archiving a session
Hover over the action menu in the cockpit (PI Planning sessions) and choose “Archive“.
Un-archiving a session
Make sure that you checked the “Show archived sessions“ box on the PI Planning sessions page in the cockpit
Scroll to the session you want to un-archive
Select “Unarchive“ in the drop-down action menu
Showing archived sessions in the cockpit
Check the box “Show archived sessions“ on the PI Plannings page in the cockpit. The archived sessions will be displayed in the list (grayed out). You can still edit an archived session as you would normally.
Accessing an archived session in the App
In the app; scroll down to the bottom of the session-list
Check the box “Show archived sessions“
Archived sessions will appear grayed out in the list. You can open such a session by clicking on the name