Mašḫuiluwa then asked Suppiluliuma's successor Mursili II if he could adopt Kupanta-Kurunta as a son.
Mursili quashed this rebellion, transferred Mašḫuiluwa to a priesthood in Hittite territory, and installed Kupanta-Kurunta as king.
In the early 13th century BC, Muwatalli II signed a treaty with Alaksandu of Wilusa.
In it, he informed Alaksandu that he viewed Kupanta-Kurunta as the son of Muwatti and so a member of the Hittite royal family.
In it, the Pharaoh reassured Kupanta-Kurunta that Egypt remained a full ally of Hatti and entertained no plans to aid Urhi-Tessup in any further adventures.