diff --git a/packages/core/database/src/__tests__/collection-importer.test.ts b/packages/core/database/src/__tests__/collection-importer.test.ts
index 0a9bcf8c8..e9d3c6399 100644
--- a/packages/core/database/src/__tests__/collection-importer.test.ts
+++ b/packages/core/database/src/__tests__/collection-importer.test.ts
@@ -7,7 +7,19 @@ describe('collection importer', () => {
     const reader = new ImporterReader(path.resolve(__dirname, './fixtures/collections'));
 
     const modules = await reader.read();
-    expect(modules).toBeDefined();
+
+    const posts = modules.find((m) => m.name === 'posts');
+
+    expect(posts).toMatchObject({
+      name: 'posts',
+      fields: [{ type: 'string', name: 'title' }],
+    });
+
+    posts.schema = 'test';
+
+    const modules2 = await reader.read();
+    const posts2 = modules2.find((m) => m.name === 'posts');
+    expect(posts2.schema).toBeFalsy();
   });
 
   test('extend', async () => {
diff --git a/packages/core/database/src/collection-importer.ts b/packages/core/database/src/collection-importer.ts
index 2dcae4e45..1d1a78a29 100644
--- a/packages/core/database/src/collection-importer.ts
+++ b/packages/core/database/src/collection-importer.ts
@@ -1,6 +1,6 @@
 import path from 'path';
 import { readdir } from 'fs/promises';
-import { isPlainObject } from 'lodash';
+import { cloneDeep, isPlainObject } from 'lodash';
 import { requireModule } from '@nocobase/utils';
 
 export type ImportFileExtension = 'js' | 'ts' | 'json';
@@ -36,6 +36,6 @@ export class ImporterReader {
         return typeof mod === 'function' ? mod() : mod;
       });
 
-    return (await Promise.all(modules)).filter((module) => isPlainObject(module));
+    return (await Promise.all(modules)).filter((module) => isPlainObject(module)).map((module) => cloneDeep(module));
   }
 }