diff --git a/packages/config/src/dynamo/dynamo.config.base.ts b/packages/config/src/dynamo/dynamo.config.base.ts
index 33d363929..3383899e9 100644
--- a/packages/config/src/dynamo/dynamo.config.base.ts
+++ b/packages/config/src/dynamo/dynamo.config.base.ts
@@ -12,8 +12,8 @@ export class ConfigDynamoBase<T extends BaseConfig = BaseConfig> {
     prefix: ConfigPrefix;
 
     id(name: string): string {
-        const output: string[] = [this.prefix, name];
-        return output.join('_');
+        if (name.startsWith(`${this.prefix}_`)) return name;
+        return `${this.prefix}_${name}`;
     }
 
     is(obj: BaseConfig): obj is T {