 Isa also sought to evade Qalawun's troops and barricaded himself in the desert fortress of al-Rahba.He was replaced by his relative Muhammad ibn Abu Bakr as punishment by Qalawun for supporting Sunqur's revolt.Muhammad's appointment was likely in name only, and in any case, Isa reconciled with Qalawun by 1280, when the sultan received him in Cairo.