cloneGroupId

The ID of the clone group with which the DB cluster is associated. For newly created clusters, the ID is typically null.

If you clone a DB cluster when the ID is null, the operation populates the ID value for the source cluster and the clone because both clusters become part of the same clone group. Even if you delete the clone cluster, the clone group ID remains for the lifetime of the source cluster to show that it was used in a cloning operation.

For PITR, the clone group ID is inherited from the source cluster. For snapshot restore operations, the clone group ID isn't inherited from the source cluster.