diff --git a/api/controllers/console/datasets/datasets_document.py b/api/controllers/console/datasets/datasets_document.py
index 21ede0e238..6a0b63097c 100644
--- a/api/controllers/console/datasets/datasets_document.py
+++ b/api/controllers/console/datasets/datasets_document.py
@@ -1432,7 +1432,7 @@ class DocumentGenerateSummaryApi(Resource):
                 continue
 
             # Dispatch async task
-            generate_summary_index_task(dataset_id, document.id)
+            generate_summary_index_task.delay(dataset_id, document.id)
             logger.info(
                 "Dispatched summary generation task for document %s in dataset %s",
                 document.id,
diff --git a/api/tasks/regenerate_summary_index_task.py b/api/tasks/regenerate_summary_index_task.py
index db6e6f854e..2c688652d2 100644
--- a/api/tasks/regenerate_summary_index_task.py
+++ b/api/tasks/regenerate_summary_index_task.py
@@ -6,7 +6,7 @@ from collections import defaultdict
 
 import click
 from celery import shared_task
-from sqlalchemy import and_, or_, select
+from sqlalchemy import or_, select
 
 from extensions.ext_database import db
 from models.dataset import Dataset, DocumentSegment, DocumentSegmentSummary