I think the 6th foreteller changed the last page of the books of prophecies to alarm them and make their followers gather all the light, for what purpose? I don't know but maybe that's why master eraqus hates darkness so much because they passed the knowledge to the next generation and the next and you how it goes even reaching xehanort's and eraqus master. But you know that xehanort it's against it.
I think the 6th foreteller changed the last page of the books of prophecies to alarm them and make their followers gather all the light, for what purpose? I don't know but maybe that's why master eraqus hates darkness so much because they passed the knowledge to the next generation and the next and you how it goes even reaching xehanort's and eraqus master. But you know that xehanort it's against it.