diff --git a/qlib/workflow/exp.py b/qlib/workflow/exp.py
index 7c98fd68f..15bb7604c 100644
--- a/qlib/workflow/exp.py
+++ b/qlib/workflow/exp.py
@@ -176,8 +176,6 @@ class MLflowExperiment(Experiment):
         self.client = mlflow.tracking.MlflowClient(tracking_uri=self._uri)
 
     def start(self, recorder_name=None):
-        # set the active experiment
-        mlflow.set_experiment(self.name)
         logger.info(f"Experiment {self.id} starts running ...")
         # set up recorder
         recorder = self.create_recorder(recorder_name)