Hallo Koca
The prices displayed in your screenshot are already the ‘half fare’ prices, as you most probably already have selected half fare as reduction option in your passenger profile. The full fare prices (without half fare card) for this connection would be 79.00 regular or 49.00 saver.
You don’t need a half fare card now for purchasing any of the displayed ticket options right now. But you will need a half fare card valid on July 22nd for traveling with those, regardless whether you chose supersaver, supersaver flex, or regular.
So if you don’t plan to get a half fare card, you should remove the reduction option in your profile, so the saver option will cost the full fare 49.00.
Note that the supersaver ticket is not refundable and is tied to the mentioned train(s), it is invalid on later trains if you should miss the first one in Geneva at 04:08am. The regular ticket would be however valid all day on any later train on that route.