最简单的解决方案是不删除或重设父项。

The simplest solution is to not remove or reparent.

Service Pack分支仅是名称上的 Service Pack分支。删除版本分支，然后将服务包分支重命名为版本。

The service pack branch is the "service pack branch" in name only. Delete the "release" branch and rename the "service pack branch" to "release".