diff --git a/api/schedule/clean_embedding_cache_task.py b/api/schedule/clean_embedding_cache_task.py
index 67d070682867bb..9efe120b7a57fe 100644
--- a/api/schedule/clean_embedding_cache_task.py
+++ b/api/schedule/clean_embedding_cache_task.py
@@ -14,7 +14,7 @@
 @app.celery.task(queue="dataset")
 def clean_embedding_cache_task():
     click.echo(click.style("Start clean embedding cache.", fg="green"))
-    clean_days = int(dify_config.CLEAN_DAY_SETTING)
+    clean_days = int(dify_config.PLAN_SANDBOX_CLEAN_DAY_SETTING)
     start_at = time.perf_counter()
     thirty_days_ago = datetime.datetime.now() - datetime.timedelta(days=clean_days)
     while True: