fix 线上课有教学点

mec-web/src/main/java/com/ym/mec/web/controller/CourseScheduleController.java

@@ -90,9 +90,10 @@ public class CourseScheduleController extends BaseController {
             if(CollectionUtils.isEmpty(classGroupTeacherMappers)){
                 throw new BizException("乐团老师设置有误");
             }
+            Integer schoolId = courseSchedule.getTeachMode().equals(TeachModeEnum.ONLINE) ? null : musicGroup.getSchoolId();
             courseSchedule.setTeacherId(classGroupTeacherMappers.get(0).getUserId());
             courseSchedule.setActualTeacherId(classGroupTeacherMappers.get(0).getUserId());
-            courseSchedule.setSchoolId(musicGroup.getSchoolId());
+            courseSchedule.setSchoolId(schoolId);
             courseSchedule.setMusicGroupId(musicGroup.getId());
             courseSchedule.setGroupType(GroupType.MUSIC);
             courseSchedule.setStatus(CourseStatusEnum.NOT_START);