update

mec-biz/src/main/java/com/ym/mec/biz/service/impl/CourseScheduleServiceImpl.java

@@ -2227,7 +2227,7 @@ public class CourseScheduleServiceImpl extends BaseServiceImpl<Long, CourseSched
         Map<Long, IntegerAndIntegerListDto> classGroupTeachingTeacherMap = classGroupAndUserIdsMap.stream()
                 .collect(Collectors.toMap(IntegerAndIntegerListDto::getId, integerAndIntegerListDto -> integerAndIntegerListDto));
 
-        existCourseSchedules.sort(Comparator.comparing(CourseSchedule::getStartClassTime));
+		allCourseSchedules.sort(Comparator.comparing(CourseSchedule::getStartClassTime));
         courseSchedules.sort(Comparator.comparing(CourseSchedule::getStartClassTime));
 
         newNode: