修改CP计划时，判断CP计划是否存在，不存在则报错

src/main/java/com/wangxiaolu/promotion/domain/activityplanv2/dao/impl/ActivityPlanInfoDaoImpl.java

@@ -71,8 +71,8 @@ public class ActivityPlanInfoDaoImpl implements ActivityPlanInfoDao {
     public void updateById(ActivityPlanInfoDto planDto) {
         // 判断计划是否存在
         ActivityPlanInfoDo activityPlanInfoDo = activityPlanInfoMapper.selectPlan(planDto.getStoreCode(), planDto.getDate());
-        if (Objects.nonNull(activityPlanInfoDo)){
-            throw new DataException(RCode.ACTIVITY_PLAN_REPETITION_ERROR);
+        if (Objects.isNull(activityPlanInfoDo)){
+            throw new DataException(RCode.ACTIVITY_PLAN_IS_NULL);
         }
         ActivityPlanInfoDo planDo = BeanUtils.transitionDto(planDto, ActivityPlanInfoDo.class);
         activityPlanInfoMapper.updateById(planDo);