diff --git a/federatedscope/core/configs/yacs_config.py b/federatedscope/core/configs/yacs_config.py
index 9606550ae..cd1c6ae00 100644
--- a/federatedscope/core/configs/yacs_config.py
+++ b/federatedscope/core/configs/yacs_config.py
@@ -148,7 +148,7 @@ def __init__(self, init_dict=None, key_list=None, new_allowed=False):
 
         # Allow new attributes after initialisation
         self.__dict__[CfgNode.NEW_ALLOWED] = new_allowed
-        return init_dict
+        # return init_dict
 
     @classmethod
     def _create_config_tree_from_dict(cls, dic, key_list):