Problems related to the connection of allen bradley PLC

What is the reason of Allen Bradley redundant module show disqualified…?

You can put two PLC controllers in one rack and they both have the same PLC program so one of them will be the redundant module. It is actually made as a backup in case if the main module had failed. I think you need to look in the PLC program configuration and disable the redundancy property since, in reality, you don’t have it in the rack.