diff --git a/deepmd/dpmodel/fitting/invar_fitting.py b/deepmd/dpmodel/fitting/invar_fitting.py
index e795953a75..f7c091843b 100644
--- a/deepmd/dpmodel/fitting/invar_fitting.py
+++ b/deepmd/dpmodel/fitting/invar_fitting.py
@@ -187,10 +187,6 @@ def compute_output_stats(self, merged):
         """Update the output bias for fitting net."""
         raise NotImplementedError
 
-    def init_fitting_stat(self, result_dict):
-        """Initialize the model bias by the statistics."""
-        raise NotImplementedError
-
     def output_def(self):
         return FittingOutputDef(
             [
diff --git a/deepmd/dpmodel/fitting/make_base_fitting.py b/deepmd/dpmodel/fitting/make_base_fitting.py
index 041076ba89..c7341798c3 100644
--- a/deepmd/dpmodel/fitting/make_base_fitting.py
+++ b/deepmd/dpmodel/fitting/make_base_fitting.py
@@ -67,10 +67,6 @@ def compute_output_stats(self, merged):
             """Update the output bias for fitting net."""
             raise NotImplementedError
 
-        def init_fitting_stat(self, **kwargs):
-            """Initialize the model bias by the statistics."""
-            raise NotImplementedError
-
         @abstractmethod
         def serialize(self) -> dict:
             """Serialize the obj to dict."""