" No repository" after renaming parent-group of a project's group

Scenario: I created

• a group "nknapp-test-group"
• with a subgroup "nknapp-test-sub-group"
• and a project "test-project" within the subgroup

After changing the path of "nknapp-test-group" to "nknapp-test-group-renamed", there is an error message No repository after clicking on the "test-project" (see https://gitlab.com/nknapp-test-group-renamed/nknapp-test-sub-group/test-project)

On our internal gitlab-ce instance (just upgraded to 9.0.4), the dashboard view "Your projects" still displays the old name and the link also points to the old URL.