fix: 合并主课误判为被合并课程

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

@@ -195,7 +195,7 @@ public class CourseScheduleController extends BaseController {
         if(Objects.isNull(oldCourseSchedule)){
             return failed("未找到指定课程");
         }
-        if(Objects.nonNull(oldCourseSchedule.getNewCourseId())){
+        if(Objects.nonNull(oldCourseSchedule.getNewCourseId())&&!oldCourseSchedule.getNewCourseId().equals(oldCourseSchedule.getId())){
             return failed("被合并课程禁止调整");
         }
         if(GroupType.VIP.equals(oldCourseSchedule.getGroupType())){