diff --git a/src/ai/backend/manager/api/schema.graphql b/src/ai/backend/manager/api/schema.graphql
index d09f07d0372..fe8fe0df6a4 100644
--- a/src/ai/backend/manager/api/schema.graphql
+++ b/src/ai/backend/manager/api/schema.graphql
@@ -1367,6 +1367,7 @@ This action cannot be undone.
 type PurgeUser {
   ok: Boolean
   msg: String
+  bgtask_id: UUID
 }
 
 input PurgeUserInput {