[UC] fix _load_state_dict_into_model (#10645)

Author: DesmonDay

paddlenlp/trainer/unified_checkpoint/load_dynamic.py

@@ -307,7 +307,8 @@ def load_unified_checkpoint_dynamically(args, model, resume_from_checkpoint, saf
     )
     dist.barrier()
     logger.debug("Setting state dict into model ...")
-    error_msgs = _load_state_dict_into_model(model, state_dict, "")
+    model_to_load_state_dict = model.state_dict()
+    error_msgs = _load_state_dict_into_model(model, state_dict, "", model_to_load_state_dict)
     if len(error_msgs) > 0:
         error_msg = "\n\t".join(error_msgs)
         raise RuntimeError(f"Error(s) in loading dynamic state_dict for {model.__class__.__name__}:\n\t{error_msg}")