diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/client/interfaces/attachment.ts b/packages/plugins/@nocobase/plugin-file-manager/src/client/interfaces/attachment.ts
index 0213469f2..3967b36ee 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/client/interfaces/attachment.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/client/interfaces/attachment.ts
@@ -11,6 +11,7 @@ export class AttachmentFieldInterface extends CollectionFieldInterface {
   isAssociation = true;
   default = {
     type: 'belongsToMany',
+    target: 'attachments',
     // name,
     uiSchema: {
       type: 'array',