BPCUI0258W The following internal resources of a storage system you are attempting to add are already assigned to a capacity pool. Are you sure you want to move these resources to a different capacity pool?

Explanation

When a storage system is added to a capacity pool, all of its internal resources (storage pools, NSDs, and file systems) are indirectly assigned to that capacity pool. You are attempting to add one or more storage systems to a capacity pool, but one or more of the storage-system internal resources are already assigned to another capacity pool. If you continue, the resources will be reassigned at the storage system level to the capacity pool you specified.