According to The Telegraph, the conversation with Knight happened before his departure from the upcoming Star Wars movie, but ...
Nine years after Rey and Kylo Ren were first introduced in Star Wars: The Force Awakens ... bond within the sequel trilogy, as Ben Solo died before they had the chance to truly get to know ...
which is the furthest into the Star Wars timeline she has appeared. While it's obviously possible that she died in battle or some other way before Rey's movie, it doesn't seem like age alone ...