loding old workflow with R Xgboost 1.5.2.1

[ZWael]

Hello,
I had saved a tidymodel workflow using Xgboost 1.5.2.1 in rdata file using the save() function.
recently i was forced to passe to xgboost 1.7.8.1
I was able to load the workflow and make prediction
but having some warning (see below) when using the predict function recommending to :
export the model by calling Booster.save_model from the old version first, then load it back in current version
which will not save the workflow ...

What is the best way to save and load a workflow implementing Xgboost 1.5.2.1

[12:47:27] WARNING: src/learner.cc:1203: 
  If you are loading a serialized model (like pickle in Python, RDS in R) generated by
  older XGBoost, please export the model by calling `Booster.save_model` from that version
  first, then load it back in current version. See:

    https://xgboost.readthedocs.io/en/latest/tutorials/saving_model.html

  for more details about differences between saving model and serializing.

[12:47:27] WARNING: src/learner.cc:888: Found JSON model saved before XGBoost 1.6, please save the model using current version again. The support for old JSON model will be discontinued in XGBoost 2.3.
[12:47:27] WARNING: src/learner.cc:553: 
  If you are loading a serialized model (like pickle in Python, RDS in R) generated by
  older XGBoost, please export the model by calling `Booster.save_model` from that version
  first, then load it back in current version. See:

    https://xgboost.readthedocs.io/en/latest/tutorials/saving_model.html

  for more details about differences between saving model and serializing.