targetDbClusterSnapshotIdentifier    
  The identifier of the new DB cluster snapshot to create from the source DB cluster snapshot. This parameter is not case-sensitive.
Constraints:
- Must contain from 1 to 63 letters, numbers, or hyphens. 
- First character must be a letter. 
- Cannot end with a hyphen or contain two consecutive hyphens. 
Example: my-cluster-snapshot2