check the following link and also you can see to upgrade path from the diagram given below
http://www.cisco.com/c/en/us/products/collateral/cloud-systems-management/prime-infrastructure/data_sheet_c78-729088.html
http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/2-0/release/notes/cpi_rn.html