fix #1770

src/llmtuner/train/tuner.py

@@ -38,8 +38,8 @@ def export_model(args: Optional[Dict[str, Any]] = None):
     model_args, _, finetuning_args, _ = get_infer_args(args)
     model, tokenizer = load_model_and_tokenizer(model_args, finetuning_args)
 
-    if getattr(model, "quantization_method", None):
-        raise ValueError("Cannot export a quantized model.")
+    if getattr(model, "quantization_method", None) and model_args.adapter_name_or_path is not None:
+        logger.warning("Cannot merge adapters to a quantized model.")
 
     model.config.use_cache = True
     model = model.to("cpu")