Merge branch 'master' of http://git.dayaedu.com/yonge/mec

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

@@ -2541,7 +2541,10 @@ public class PracticeGroupServiceImpl extends BaseServiceImpl<Long, PracticeGrou
             if (Objects.nonNull(teacherFreeTime.getTotalTimes())) {
                 maxTeacherCourses = teacherFreeTime.getTotalTimes();
             }
+        }else{
+            return BaseController.failed(HttpStatus.MULTIPLE_CHOICES,"抱歉啦，当前所选时段组合，「" + teacher.getRealName() + "」老师已被预约，请重新选择时段或更换老师后重试。");
         }
+
         int courseWeekNum = 0;
         int practiceCourseNum = 0;
         LocalDateTime tempClassDateTime;