当命名空间不存在时，仍然可以创建配置。When the namespace does not exist, a configuration can still be created.

[fuhouyu]

Issue Description

命名空间不存在或已经被删除时，仍然可以创建配置。在创建完成再回到页面，命名空间在页面上会存在找不到的问题
When the namespace does not exist or has been deleted, a configuration can still be created. After the creation is completed and you return to the page, there will be an issue of the namespace existing but not being found.

Describe what happened (or what feature you want)

Describe what you expected to happen

不允许访问不存在的命名空间，及创建配置
Access to non-existent namespaces is not allowed, as well as creating configurations.

How to reproduce it (as minimally and precisely as possible)

Tell us your environment

Anything else we need to know?

[fuhouyu]

@i will solve it@