Is it obligatory to repeat the Maghrib prayer if I prayed four rak'ahs, thinking it was the 'Isha' prayer, then realized it was the Maghrib prayer before the call to prayer for 'Isha'?

If someone prayed 'Isha before Maghrib, having forgotten Maghrib, then they must repeat the Maghrib prayer, and then repeat 'Isha, because they prayed 'Isha out of its prescribed time, and prayer performed out of its prescribed time is not valid. However, if she prayed Maghrib after sunset, it is sufficient for her, but then she must repeat 'Isha because she prayed it before its time.