Error when deleting an admin

[kaiyou]

I get the following error when deleting a global admin:

admin_1     | Traceback (most recent call last):
admin_1     |   File "/usr/local/lib/python3.5/site-packages/gunicorn/workers/sync.py", line 135, in handle
admin_1     |     self.handle_request(listener, req, client, addr)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/gunicorn/workers/sync.py", line 176, in handle_request
admin_1     |     respiter = self.wsgi(environ, resp.start_response)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 2000, in __call__
admin_1     |     return self.wsgi_app(environ, start_response)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1991, in wsgi_app
admin_1     |     response = self.make_response(self.handle_exception(e))
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1567, in handle_exception
admin_1     |     reraise(exc_type, exc_value, tb)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise
admin_1     |     raise value
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1988, in wsgi_app
admin_1     |     response = self.full_dispatch_request()
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1641, in full_dispatch_request
admin_1     |     rv = self.handle_user_exception(e)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1544, in handle_user_exception
admin_1     |     reraise(exc_type, exc_value, tb)
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise
admin_1     |     raise value
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1639, in full_dispatch_request
admin_1     |     rv = self.dispatch_request()
admin_1     |   File "/usr/local/lib/python3.5/site-packages/flask/app.py", line 1625, in dispatch_request
admin_1     |     return self.view_functions[rule.endpoint](**req.view_args)
admin_1     |   File "/app/freeposte/admin/utils.py", line 18, in wrapper
admin_1     |     "confirm.html", action=action.format(*args, **kwargs),
admin_1     | KeyError: 'admin '