aws rds promote-read-replica
Promotes a read replica DB instance to a standalone DB instance. AWS CLI reference
4 options Its page in the AWS CLI reference
Options
--backup-retention-periodThe number of days for which automated backups are retained.--db-instance-identifierThe DB instance identifier.--preferred-backup-windowThe daily time range during which automated backups are created if automated backups are enabled, using the BackupRetentionPeriod parameter.--tag-specificationsTags to assign to resources associated with the DB instance.