Adding few new fields to Custom infotype already developed
I have a requirement to add new fields to already available custom infotype. I have to edit the PS structure and add few fields there and activate it. My question is, when I tick on "Generate Objects" after maintaining the PS structure, it will show pop up boxes asking whether to overwrite those objects already exists, shall I tick it or exit? Because the code is already written in the module pool for some validations,if I regenerate the objects, will the complete code will be erased?
Please guide me in this regard.