Unable to create new label from board for sub-group project

Summary

Create label in sub-group's board not work

Steps to reproduce

  1. Create a group called 'Your Corp'
  2. Create a sub-group called 'Your team'
  3. Create a new project in 'Your team'
  4. Switch to Issue > Board
  5. Create a new issue
  6. Click issue, Check sidebar at right, click 'edit' in Labels, click 'Create new label'
  7. Done, It will not work, this action will try access http://your-url/sub-group/proj-name, but correct URL should be http://your-url/your-corp/sub-group/proj-name

What is the current bug behavior?

No response

What is the expected correct behavior?

Create a new label

Results of GitLab environment info

GitLab CE 9.1.0