First verify that both texts refer to the same event. Compare time, place, materials and deadlines field by field. Do not use the new posting date as the event date.
Information to locate
Korean expression
변경
시작시각이오전열시에서열한시로바뀌었어요.
추가
준비물에펜이추가됐어요.
제외
사진은제출하지않아도돼요.
유지
신청마감은그대로예요.
Here removing the photo requirement means it is no longer required, not that photos are forbidden. Mere omission from a short message does not prove that a requirement was removed.