Error: Bloque no compatible, el tipo de bloque “movido” no se espera aquí.

Estoy probando el bloque “moved” de terraform, pero estoy obteniendo el siguiente error al usarlo.

El archivo main.tf se ve así:

module "docdb" {
  source = "./modules/docdb"
  docdb_subnet_group_name = "${var.project_name}-${var.environment}-group"
  docdb_subnet_ids = module.vpc.private_subnets
  docdb_cluster_identifier = "${var.project_name}-${var.environment}-docdb"
  docdb_username = random_password.uname_create[0].result
  docdb_password = random_password.password_create[0].result
  skip_final_snapshot = var.skip_final_snapshot
  docdb_vpc_security_group_ids = [module.sg_docdb.security_group_id]
  docdb_cluster_instance_count = var.docdb_cluster_instance_count
  docdb_cluster_instance_identifier = "docdb-cluster-${var.environment}-${count.index}"
  instance_class = var.instance_class
  docdb_parameter_group_name = "${var.project_name}-${var.environment}-docdb"
}

moved {
  from = aws_docdb_cluster.docdb
  to = module.docdb.aws_docdb_subnet_group.docdbgroup
}

moved {
  from = aws_docdb_cluster_instance.docdb_cluster_instances[0]
  to = module.docdb.aws_docdb_cluster.docdb
}

moved {
  from = aws_docdb_cluster_parameter_group.cluster_para_group
  to = module.docdb.aws_docdb_cluster_instance.docdb_cluster_instances
}

moved {
  from = aws_docdb_subnet_group.docdbgroup
  to = module.docdb.aws_docdb_cluster_parameter_group.cluster_para_group
}

Obtengo el siguiente error al ejecutar terraform init:

Error: Tipo de bloque no compatible
en el archivo docdb.tf línea 18:
18: moved {
Los bloques de tipo “moved” no se esperan aquí.