# In Documentation [Doc](https://huggingface.co/docs/transformers/main_classes/callback#transformers.integrations.MLflowCallback) said we can reattach to an existing run by set **MLFLOW_RUN_ID** environment variable. # In Code But [Code](https://github.com/huggingface/transformers/blob/118e9810687dd713b6be07af79e80eeb1d916908/src/transformers/integrations.py#L990) seems making new mlflow run with **args.run_name**. # ASIS - code at https://github.com/huggingface/transformers/blob/118e9810687dd713b6be07af79e80eeb1d916908/src/transformers/integrations.py#L990 ``` self._ml_flow.start_run(run_name=args.run_name, nested=self._nested_run) ``` # TOBE ``` self._ml_flow.start_run(run_id=self._run_id, nested=self._nested_run) ```