Workcenter or Module Center Access

Dear All

We are using PSFSCM 9.2 PT 8.53 with no or zero image update. Kindly guide how to stop the visibility of a Module workcenter like buyer workcenter in Purchasing or General Ledger Center in the General Ledger module review below screenshot as an example. Kindly note the navigation visible in the workcenter/GL Center aren't workable since the user isn't authorized to access that particular navigation but still since its' appearing in navigation under (Main Menu - General Ledger - General Ledger Center) we would like that particular workcenter doesn't appear at all in the module navigation, so that user didn't