图5
1、参考 Creating merge requests：https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html
2、进入 Project，在左侧菜单中选择 Merge requests，然后选择右上角的 New merge request。如图1
3、选择 Source branch，为自己的当前分支：feature/theme-store-wangqiang，选择 Target branch，为期望合并至的目标分支：feature/theme-store，最后点击 Compare branches and continue。如图2
4、在表单页面中，编辑 Title 与 Description、Reviewer，然后点击 Submit merge request。如图3
5、最终结果页面，如图4
6、如果此时再次提交一个请求，则会报错：The form contains the following error: Validate branches Another open merge request already exists for this source branch: !6989 。如图5
7、可以先将 !6989 给关闭掉。然后再次提交。如图6
