DHCP Failover btwn Servers with only Static Leases

Apparently, I have a unique situation. I cannot find a similar guide. Here goes:

Our RedHat DHCP server does not use any dynamic ranges. All clients are created a lease from a fixed database via omshell. So essentially, we only use DHCP Reservations. While this does not add much if any security, it is beneficial for accounting for devices. The clients register in our other database and then that system adds the lease to the DHCP server.

So, my question is this: How can I set up a second DHCP server with failover if I don't have any ranges defined? Or do I even need to? Can I just set up an identical server with all the same identical static reservations and let them run side-by-side. My fear is that they would both seem themselves as authoritative and start sending nack requests to the network clients even though they would both be trying to server the same IP address via reservation.

Thanks for any help or guidance that anyone can provide.