CA UIM discovery_server is discovered the dual origin for the VMware Virtual Center/ESX Server.
CA UIM v8.5 & Later
VMware probe 6.51
It may be because of the fail over, DR. Environment or duplicate MAC addresses appearing on the network
Follow the below step:
The VMware probe will republish its topology data which will include a unique internal ID for the vcenters, so the discovery_server will not correlate with other vcenter.
The Nimsoft VMware monitoring probe has the capability of handling all the common monitoring and data collection tasks on VMware VC/ESX Servers. The probe collects and stores data and information from the monitored system at customizable intervals.