diff --git a/web/src/main/resources/mapper/UsersMapper.xml b/web/src/main/resources/mapper/UsersMapper.xml
index e5fecbb..d2f3ef8 100644
--- a/web/src/main/resources/mapper/UsersMapper.xml
+++ b/web/src/main/resources/mapper/UsersMapper.xml
@@ -198,7 +198,7 @@
     
     <update id="updateSyncStatus" parameterType="java.util.Map">
         UPDATE users
-        SET sync_statuss = 0
+        SET sync_statuss = NULL
         WHERE userId = #{userId}
     </update>