diff --git a/plugins/app-backend/migrations/20240113144027_assets-namespace.js b/plugins/app-backend/migrations/20240113144027_assets-namespace.js
index c39407d08b..de6ca2e333 100644
--- a/plugins/app-backend/migrations/20240113144027_assets-namespace.js
+++ b/plugins/app-backend/migrations/20240113144027_assets-namespace.js
@@ -22,7 +22,10 @@
 exports.up = async function up(knex) {
   await knex.schema.alterTable('static_assets_cache', table => {
     // The namespace is used to allow operations on asset groups, e.g. delete all assets in a namespace
-    table.string('namespace').comment('The namespace of the file');
+    table
+      .string('namespace')
+      .defaultTo('default')
+      .comment('The namespace of the file');
     table.dropPrimary();
     table.primary(['namespace', 'path']);
   });
@@ -32,7 +35,10 @@ exports.up = async function up(knex) {
  * @param {import('knex').Knex} knex
  */
 exports.down = async function down(knex) {
-  await knex.delete().from('static_assets_cache').whereNotNull('namespace');
+  await knex
+    .delete()
+    .from('static_assets_cache')
+    .whereNot('namespace', 'default');
 
   await knex.schema.alterTable('static_assets_cache', table => {
     table.dropPrimary();
diff --git a/plugins/app-backend/src/lib/assets/StaticAssetsStore.ts b/plugins/app-backend/src/lib/assets/StaticAssetsStore.ts
index 27573300e7..038d5bd9bf 100644
--- a/plugins/app-backend/src/lib/assets/StaticAssetsStore.ts
+++ b/plugins/app-backend/src/lib/assets/StaticAssetsStore.ts
@@ -50,7 +50,7 @@ export interface StaticAssetsStoreOptions {
 export class StaticAssetsStore implements StaticAssetProvider {
   #db: Knex;
   #logger: Logger;
-  #namespace: string | null;
+  #namespace: string;
 
   static async create(options: StaticAssetsStoreOptions) {
     const { database } = options;
@@ -68,7 +68,7 @@ export class StaticAssetsStore implements StaticAssetProvider {
   private constructor(client: Knex, logger: Logger, namespace?: string) {
     this.#db = client;
     this.#logger = logger;
-    this.#namespace = namespace ?? null;
+    this.#namespace = namespace ?? 'default';
   }
 
   /**