When using the feed on explorer, the option to restore a revision is greyed out.
Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.
This is functioning as designed. It's greyed out because it is the actual revision. To enable the option to restore a previously published revision, revoke the published revision from Collaboration hub (Share > Revoke from Collaboration hub), and select or create a new revision.
KBA , BPI-SIG-PM-EXP-FEE , Feed for SAP Signavio Process Manager , How To