diff --git a/src/llamafactory/train/ppo/trainer.py b/src/llamafactory/train/ppo/trainer.py
index 6a05b704..31d461e3 100644
--- a/src/llamafactory/train/ppo/trainer.py
+++ b/src/llamafactory/train/ppo/trainer.py
@@ -106,7 +106,8 @@ class CustomPPOTrainer(PPOTrainer, Trainer):
                 DistributedDataParallelKwargs(find_unused_parameters=training_args.ddp_find_unused_parameters)
             ]
             ppo_config.accelerator_kwargs["deepspeed_plugin"] = training_args.deepspeed_plugin
-            if ppo_config.log_with == "tensorboard":  # tensorboard raises error about accelerator_kwargs
+            if ppo_config.log_with is not None:
+                logger.warning("PPOTrainer cannot use external logger when DeepSpeed is enabled.")
                 ppo_config.log_with = None
 
         # Create optimizer and scheduler