Cause & Fix for "Recoverpoint is faking the size of a lun in the replication set"

Running RecoverPoint 5.1.SP2.P1. Have this error for two LUNS:

"recoverpoint is faking the size of a lun in the replication set"

I've done a search but cannot find a fix for it.

 

What is the cause and how do we fix it?

 

Thanks!