How to change a model in case RFC module changes

Hello,

I created a prototype using web dynpro where the model used is imported using an RFC model.

The prototype is working fine but we changed the definition of the export parameters of the ABAP function module. Is there a way to change the model so it fits to the latest version of the ABAP function module without deleting the model first and recreating it, because this means a lot of work.

Any help is welcome

Bertil