gitlab-ci-multirunner Unregister not working

Summary

unregister fails

WARNING: $ sudo gitlab-runner...
ERROR: Deleting runner... forbidden

Steps to reproduce

unregister a runner

$ gitlab-ci-multi-runner stop
$ gitlab-ci-multi-runner unregister --url https://asdf.com/ci --token 43f334f34f34f34f4

Actual behavior

WARNING: Running in user-mode.
WARNING: Use sudo for system-mode:
WARNING: $ sudo gitlab-runner...

ERROR: Deleting runner... forbidden                 runner=95583f44
FATAL: Failed to delete runner

Expected behavior

Successfully deleted! whoot!

Environment description

GitLab Community Edition 8.13.6 69cda01 Self Hosted

Used GitLab Runner version

gitlab-ci-multi-runner --version
Version:      1.10.4
Git revision: b32125f
Git branch:   1-10-stable
GO version:   go1.7.5
Built:        Tue, 31 Jan 2017 14:39:18 +0000
OS/Arch:      darwin/amd64