How to update value inside shared preferences in flutter

Question

actually when saving data inside shared preferences.. I am using this code

add() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  prefs.setString('data', "ok");
}

but, is there a way to update the value of data for example I want to change ok into fine because when I try to re-save my data using that code... and call it using prefs.getString('data'); it always shows the old data not the update one

Answer 1

//shared-preferences

 SharedPreferences prefs = await SharedPreferences.getInstance();
        prefs.setString('profileImg', data1['imagePath']);
        prefs.setString('un', data1['username']);

Answer 2

Just reassign it again

prefs.setString('data', "fine");