diff --git a/manual/administration/clean_database.md b/manual/administration/clean_database.md
index 104c9bad..cc2670bc 100644
--- a/manual/administration/clean_database.md
+++ b/manual/administration/clean_database.md
@@ -1,7 +1,5 @@
 # Clean Database
 
-## Seahub
-
 ### Session
 
 Use the following command to clear expired session records in Seahub database: