Cannot remove group


selfhosted gitlab CE 10.5.1. I want to remove a group from After confirmation that I really want to remove the group, I get Group 'mygroup' was scheduled for deletion However, the group remains.

From production.log:

Started DELETE "/mygroup" for at 2018-02-27 11:11:03 +0100
Processing by GroupsController#destroy as HTML
  Parameters: {"utf8"=>"�~\~S", "authenticity_token"=>"[FILTERED]", "id"=>"mygroup"}
User 1 scheduled a deletion of group ID 766 with job ID 417b685eea93d69ba91abee3

Yes, with that weird �~\~S

Any help? As a last resort, I will try the API hoping that deletes the group.

Any info in admin/background_jobs and/or is sidekiq running ok?