When was Isetnofret death?

Isetnofret(or Isis-nofretor Isitnofret) (Ancient Egyptian: "the beautiful Isis") was one of the Great Royal Wives of Pharaoh Ramesses II and was the mother of his heir, Merneptah. She was one of the most prominent of the royal wives, along with Nefertari, and was the chief queen after Nefertari's death (around the 24th year of the pharaoh's reign)....