The MIB's DESCRIPTION for cucsLicenseInstanceFsmPrev is only the auto-generated stub 'Cisco UCS license:Instance:fsmPrev managed object property', but the 'fsmPrev' property name together with its SnmpAdminString type tell us this column, on a specific licensed-feature grant on a fabric interconnect (a feature name plus a quantity), holds the fsmPrev as UCS Manager's data model defines it, exposed here as a read-only SNMP value (read-only). The fsmPrev records the name of the previous FSM this license instance ran through before the current one, which is useful for reconstructing the sequence of license operations (e.g. install then activate) that this instance has already been through. If a license was first installed and then activated, fsmPrev would show the install FSM's name once the activate FSM takes over.