Hi
FYI
Usually in a deployment scenario of multiple servers, the ACS primary server functions as a master database for the configuration data, and a secondary server stores the monitoring and report data. There are some exceptions to this usual setup, which can be handled as described below:
•If ACS 5.0 primary server also functions as a log collector in your 5.0 deployment, you should interchange the primary server for one of the secondary servers in the deployment.
•If your 5.0 deployment contains only two servers, you could skip the second step (upgrading the secondary servers) listed in the deployment upgrade process.
Moreover, please make sure that you have done all the up gradation process according to the following guide:
http://www.cisco.com/c/en/us/td/docs/net_mgmt/cisco_secure_access_control_system/5-1/installation/guide/acs5_1_install_guide/csacs_upg.html#wp1152302