Update modeling_xmodel.py

modeling_xmodel.py

@@ -23,7 +23,8 @@ from transformers.modeling_outputs import (
     TokenClassifierOutput,
 )
 from transformers.modeling_rope_utils import ROPE_INIT_FUNCTIONS
-from transformers.modeling_utils import PreTrainedModel, GenerationMixin
+from transformers.modeling_utils import PreTrainedModel
+from transformers.generation import GenerationMixin
 from transformers.pytorch_utils import ALL_LAYERNORM_LAYERS
 from transformers.utils import (
     add_start_docstrings,