diff --git a/src/backend/lib/cache/AbstractCacheService.ts b/src/backend/lib/cache/AbstractCacheService.ts
index e70b95e11..3e2f8cafb 100644
--- a/src/backend/lib/cache/AbstractCacheService.ts
+++ b/src/backend/lib/cache/AbstractCacheService.ts
@@ -13,11 +13,15 @@ export abstract class AbstractCacheService {
     return `__dp__:${key}`;
   }
 
-  abstract pullItem<T>(key: string): Promise<T | undefined>;
+  protected abstract pullItem<T>(key: string): Promise<T | undefined>;
 
-  abstract persistData(key: string, data: unknown): Promise<void>;
+  protected abstract persistData(key: string, data: unknown): Promise<void>;
 
-  abstract clearItem(key: string): Promise<void>;
+  protected abstract _clearItem(key: string): Promise<void>;
+
+  async clearItem(rawKey: string) {
+    await this._clearItem(this.prefixKey(rawKey));
+  }
 
   abstract purge(): Promise<void>;
 
diff --git a/src/backend/lib/cache/MemoryCacheAdaptor.ts b/src/backend/lib/cache/MemoryCacheAdaptor.ts
index 1f9a75cf6..91c173966 100644
--- a/src/backend/lib/cache/MemoryCacheAdaptor.ts
+++ b/src/backend/lib/cache/MemoryCacheAdaptor.ts
@@ -10,24 +10,20 @@ export class MemoryCacheAdaptor extends AbstractCacheService {
     MemoryCacheAdaptor.data = {};
   }
 
-  private getData(): Record<string, unknown> {
-    return MemoryCacheAdaptor.data;
-  }
-
   async setup() {
     noop();
   }
 
   async pullItem<T>(key: string): Promise<T | undefined> {
-    return this.getData()[key] as T;
+    return MemoryCacheAdaptor.data[key] as T;
   }
 
   async persistData(key: string, data: unknown): Promise<void> {
     MemoryCacheAdaptor.data[key] = data;
   }
 
-  async clearItem(key: string) {
-    delete this.getData()[key];
+  async _clearItem(key: string) {
+    delete MemoryCacheAdaptor.data[key];
   }
 
   async purge() {
diff --git a/src/backend/lib/cache/RedisCacheAdaptor.ts b/src/backend/lib/cache/RedisCacheAdaptor.ts
index 39f00d1e5..64e4c141e 100644
--- a/src/backend/lib/cache/RedisCacheAdaptor.ts
+++ b/src/backend/lib/cache/RedisCacheAdaptor.ts
@@ -40,7 +40,7 @@ export class RedisCacheAdaptor extends AbstractCacheService {
     ).set(key, JSON.stringify(data), { EX: 60 * 60 }); // I hour
   }
 
-  async clearItem(key: string) {
+  async _clearItem(key: string) {
     await (await this.getRedisInstance()).del(key);
   }
 
diff --git a/src/backend/lib/config-persistence/DatabaseConfigDataPersistenceAdaptor.ts b/src/backend/lib/config-persistence/DatabaseConfigDataPersistenceAdaptor.ts
index 19ab1b968..ee66ba91d 100644
--- a/src/backend/lib/config-persistence/DatabaseConfigDataPersistenceAdaptor.ts
+++ b/src/backend/lib/config-persistence/DatabaseConfigDataPersistenceAdaptor.ts
@@ -4,9 +4,9 @@ import { getDbConnection } from "../connection/db";
 import { AbstractConfigDataPersistenceService } from "./AbstractConfigDataPersistenceService";
 import { ConfigDomain } from "./types";
 import { CONFIG_TABLE_PREFIX } from "./constants";
+import { createMetaData, updateMetaData } from "./portal";
 
 const CONFIG_TABLE_NAME = CONFIG_TABLE_PREFIX("config");
-
 export class DatabaseConfigDataPersistenceAdaptor<
   T
 > extends AbstractConfigDataPersistenceService<T> {
@@ -140,7 +140,7 @@ export class DatabaseConfigDataPersistenceAdaptor<
       .update({
         value: JSON.stringify(value),
         updated_at: new Date(),
-        // TODO updated_by
+        ...updateMetaData(),
       });
     if (affectedRowsCount === 0) {
       await (
@@ -151,8 +151,7 @@ export class DatabaseConfigDataPersistenceAdaptor<
         value: JSON.stringify(value),
         created_at: new Date(),
         updated_at: new Date(),
-        // TODO updated_by
-        // TODO created_by
+        ...createMetaData(),
       });
     }
   }
diff --git a/src/backend/lib/config-persistence/portal/index.ts b/src/backend/lib/config-persistence/portal/index.ts
index 757180e49..e6aedf252 100644
--- a/src/backend/lib/config-persistence/portal/index.ts
+++ b/src/backend/lib/config-persistence/portal/index.ts
@@ -1,3 +1,5 @@
 export type { PortalConfigDomain } from "./main/types";
 
 export const FOR_CODE_COV = 1;
+
+export { updateMetaData, createMetaData } from "./main";
diff --git a/src/backend/lib/config-persistence/portal/main/index.ts b/src/backend/lib/config-persistence/portal/main/index.ts
new file mode 100644
index 000000000..432a214a8
--- /dev/null
+++ b/src/backend/lib/config-persistence/portal/main/index.ts
@@ -0,0 +1,7 @@
+export const createMetaData = () => {
+  return {};
+};
+
+export const updateMetaData = () => {
+  return {};
+};