MCS presents the 1-1 redundancy feature in which the same MCS configuration can be replicated on another MCS instance.
There is a Local and a remote MCS instance. In the first MCS, the local is configured as the main, and the remote instance is secondary, and in the second MCS, the local is configured as secondary, and the remote is the main. Thus, both the MCS are active and share a common configuration. Please ensure the secondary MCS system has a clean DB before configuring it to the main MCS.
Please follow the How to configure MCS Redundancy guide to configure MCS redundancy.