diff --git a/charon/pkgs/maven.py b/charon/pkgs/maven.py
index 2ac68a4b..26745d16 100644
--- a/charon/pkgs/maven.py
+++ b/charon/pkgs/maven.py
@@ -316,17 +316,16 @@ def handle_maven_uploading(
         root=top_level
     )
     logger.info("Files uploading done\n")
-
     succeeded = True
     for target in targets:
         # 5. Do manifest uploading
-        manifest_folder = target[0]
-        logger.info("Start uploading manifest to s3 bucket %s", manifest_bucket_name)
         if not manifest_bucket_name:
             logger.warning(
                 'Warning: No manifest bucket is provided, will ignore the process of manifest '
                 'uploading\n')
         else:
+            logger.info("Start uploading manifest to s3 bucket %s", manifest_bucket_name)
+            manifest_folder = target[0]
             manifest_name, manifest_full_path = write_manifest(valid_mvn_paths, top_level, prod_key)
             s3_client.upload_manifest(
                 manifest_name, manifest_full_path,
diff --git a/charon/storage.py b/charon/storage.py
index bcb2cc87..3fcb7184 100644
--- a/charon/storage.py
+++ b/charon/storage.py
@@ -287,7 +287,7 @@ async def __copy_between_bucket(
         self, source: str, source_key: str,
         target: s3.Bucket, target_key: str
     ) -> bool:
-        logger.info(
+        logger.debug(
             "Copying file %s from bucket %s to target %s as %s",
             source_key, source, target.name, target_key)
         copy_source = {