diff --git a/main.tf b/main.tf
index 3204460..68fcc36 100644
--- a/main.tf
+++ b/main.tf
@@ -100,7 +100,7 @@ resource "aws_db_instance" "default" {
 resource "aws_db_parameter_group" "default" {
   count = length(var.parameter_group_name) == 0 && module.this.enabled ? 1 : 0
 
-  name_prefix = "${module.this.id}${module.this.delimiter}"
+  name_prefix = null
   family      = var.db_parameter_group
   tags        = module.this.tags
 
@@ -121,7 +121,7 @@ resource "aws_db_parameter_group" "default" {
 resource "aws_db_option_group" "default" {
   count = length(var.option_group_name) == 0 && module.this.enabled ? 1 : 0
 
-  name_prefix          = "${module.this.id}${module.this.delimiter}"
+  name_prefix          = null
   engine_name          = var.engine
   major_engine_version = local.major_engine_version
   tags                 = module.this.tags