The following scenarios involve the Manager:
Upgrade from a homogeneous Sensor environment in 9.1 or 9.2 to a heterogeneous Sensor environment in 10.1:
Upgrade from a heterogeneous Sensor environment in 9.1 or 9.2 to a heterogeneous Sensor environment in 10.1:
See Upgrade path for the Central Manager and Manager to know the Manager versions that you need to upgrade to the latest 10.1.