The entry of the name column in advance settings cannot be modified, and vCenter cannot add the new entry as well, if the entry of the same cluster ID is already present.
The wrong entry added in the advanced settings of the same cluster must be removed, which is not possible from advance settings of the VC UI.
Note: Please take the snapshot of the VC VM and create a proper backup of the vpxd.cfg file.
use the VI editor find the line which has entry of advance settings of the vCLS VMs for the required cluster.