Florence2LanguageForConditionalGeneration has no shift_tokens_right method defined in the class

Call `prepare_decoder_input_ids_from_labels` instead of `shift_tokens_right` as it is not defined in `Florence2LanguageForConditionalGeneration`

modeling_florence2.py

@@ -2841,7 +2841,7 @@ class Florence2ForConditionalGeneration(Florence2PreTrainedModel):
         }
     
     def prepare_decoder_input_ids_from_labels(self, labels: torch.Tensor):
-        return self.language_model.shift_tokens_right(labels)
+        return self.language_model.prepare_decoder_input_ids_from_labels(labels)
 
     def _reorder_cache(self, *args, **kwargs):
         return self.language_model._reorder_cache(*args, **kwargs)