As we document, CABI 4.1 does not support upgrades from 3.x.
A new system is required to facilitate migration of data from a 3.x CABI host to the new CABI 4.1 host.
Install the CABI 4.1 on a new, separate machine, You cannot install CABI on top of 3.x.
Note - While CABI 3.3 and CABI 4.1 can be installed on the same system (changing ports), CA Technologies and SAP do not recommend having CABI 3.3 and CABI 4.1 installed on the same host.
CA Support reserves the right to have our customers a fresh installation of CABI 4.1 to receive the support