def on_btn_add_fit(self, event):
        """
        add a new interpretation to the current specimen

        Parameters
        ----------
        event : the wx.ButtonEvent that triggered this function

        Alters
        ------
        pmag_results_data
        """
        if self.auto_save.GetValue():
            self.current_fit = self.add_fit(self.s, None, None, None, saved=True)
        else:
            self.current_fit = self.add_fit(self.s, None, None, None, saved=False)
        self.generate_warning_text()
        self.update_warning_box()

        if self.ie_open:
            self.ie.update_editor()

        self.update_fit_boxes(True)
        # Draw figures and add  text
        self.get_new_PCA_parameters(event)