You can call DescribeValidDBInstanceModifications to learn what modifications you can make to your DB instance
Source:R/rds_operations.R
rds_describe_valid_db_instance_modifications.RdYou can call describe_valid_db_instance_modifications to learn what modifications you can make to your DB instance. You can use this information when you call modify_db_instance.
See https://www.paws-r-sdk.com/docs/rds_describe_valid_db_instance_modifications/ for full documentation.