device not found: hard disk 2

Hi Gurus

I have replicated a VM that in the protected site has two(2) disks, one of them is an attached RDM, this disk I don't want to replicate to the DR site, so went and made the changes and did not pick the disk (2) to be replicated  , but when I try to add the VM to the Protection Group, I get the error

" Device not found: Hard disk 2"

any Help gurus

Thanks a bunch