diff --git a/config/src/main/java/com/alibaba/nacos/config/server/service/repository/ExternalStoragePersistServiceImpl.java b/config/src/main/java/com/alibaba/nacos/config/server/service/repository/ExternalStoragePersistServiceImpl.java
index 042bdb51b..172b923d6 100644
--- a/config/src/main/java/com/alibaba/nacos/config/server/service/repository/ExternalStoragePersistServiceImpl.java
+++ b/config/src/main/java/com/alibaba/nacos/config/server/service/repository/ExternalStoragePersistServiceImpl.java
@@ -630,7 +630,7 @@ public class ExternalStoragePersistServiceImpl implements PersistService {
 		try {
 			return jt.queryForObject(sql, Long.class);
 		} catch (NullPointerException e) {
-			return 0l;
+			return 0;
 		}
 	}