'Update the value of \'first_attempted\' to now() if we aren\'t
using score-based estimates.'

@classmethod
def _prepare_first_attempted_for_create(cls, params):

    if ((params['first_attempted'] is not None) and (not waffle.waffle().is_enabled(waffle.ESTIMATE_FIRST_ATTEMPTED))):
        params['first_attempted'] = now()
