修改营期不修改创建时间

src/views/course/userCoursePeriod/index.vue

@@ -1164,6 +1164,7 @@ export default {
             copyPeriod(this.copySourcePeriodId).then(response => {
               if (response.code === 200) {
                 data.periodId = response.data;
+                data.createTime = null;
                 updatePeriod(data).then(res => {
                   if (res.code === 200) {
                     this.msgSuccess("复制成功");