sourceDbClusterSnapshotIdentifier
The identifier of the cluster snapshot to copy. This parameter is not case sensitive.
Constraints:
Must specify a valid system snapshot in the available state.
If the source snapshot is in the same Amazon Web Services Region as the copy, specify a valid snapshot identifier.
If the source snapshot is in a different Amazon Web Services Region than the copy, specify a valid cluster snapshot ARN.
Example: my-cluster-snapshot1