Unable to edit my Field in Admin with django-leaflet about django-geojson HOT 8 OPEN

class lieu(models.Model):
    nom = models.CharField(max_length = 100)
    geom = GeometryField()

from plan.models import lieu

admin.site.register(lieu, LeafletGeoAdmin)

Environment:

Request Method: GET
Request URL: http://127.0.0.1:8000/fr/admin/plan/lieu/add/

Django Version: 1.9.7
Python Version: 3.4.2
Installed Applications:
['djangocms_admin_style',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.admin',
 'django.contrib.sites',
 'django.contrib.sitemaps',
 'django.contrib.staticfiles',
 'django.contrib.messages',
 'cms',
 'menus',
 'sekizai',
 'treebeard',
 'djangocms_text_ckeditor',
 'djangocms_style',
 'djangocms_column',
 'filer',
 'easy_thumbnails',
 'cmsplugin_filer_image',
 'cmsplugin_filer_file',
 'cmsplugin_filer_folder',
 'cmsplugin_filer_teaser',
 'cmsplugin_filer_utils',
 'cmsplugin_filer_video',
 'djangocms_googlemap',
 'djangocms_inherit',
 'djangocms_link',
 'reversion',
 'bgl',
 'ckeditor',
 'recurrence',
 'haystack',
 'aldryn_common',
 'aldryn_boilerplates',
 'aldryn_video',
 'aldryn_search',
 'aldryn_bootstrap3',
 'standard_form',
 'debug_toolbar',
 'spurl',
 'leaflet',
 'djgeojson',
 'adminsortable2',
 'gunicorn',
 'nocaptcha_recaptcha',
'plan']
Installed Middleware:
['debug_toolbar.middleware.DebugToolbarMiddleware',
 'cms.middleware.utils.ApphookReloadMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.locale.LocaleMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'cms.middleware.user.CurrentUserMiddleware',
 'cms.middleware.page.CurrentPageMiddleware',
 'cms.middleware.toolbar.ToolbarMiddleware',
 'cms.middleware.language.LanguageCookieMiddleware']



Traceback:

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/contrib/admin/options.py" in wrapper
  541.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/utils/decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  57.         response = view_func(request, *args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/contrib/admin/sites.py" in inner
  244.             return view(request, *args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/contrib/admin/options.py" in add_view
  1437.         return self.changeform_view(request, None, form_url, extra_context)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/utils/decorators.py" in _wrapper
  67.             return bound_func(*args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/utils/decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/utils/decorators.py" in bound_func
  63.                 return func.__get__(self, type(self))(*args2, **kwargs2)

File "/usr/lib/python3.4/contextlib.py" in inner
  30.                 return func(*args, **kwds)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/contrib/admin/options.py" in changeform_view
  1367.         ModelForm = self.get_form(request, obj)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/contrib/admin/options.py" in get_form
  639.             return modelform_factory(self.model, **defaults)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/forms/models.py" in modelform_factory
  545.     return type(form)(class_name, (form,), form_class_attrs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/forms/models.py" in __new__
  247.                                       opts.field_classes)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/forms/models.py" in fields_for_model
  176.             formfield = formfield_callback(f, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/leaflet/admin.py" in formfield_for_dbfield
  42.             return db_field.formfield(**kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/djgeojson/fields.py" in formfield
  65.         return super(GeoJSONField, self).formfield(**kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/jsonfield/fields.py" in formfield
  46.         return super(JSONField, self).formfield(**defaults)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/db/models/fields/__init__.py" in formfield
  903.         return form_class(**defaults)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/jsonfield/forms.py" in __init__
  15.         super(JSONFormField, self).__init__(*args, **kwargs)

File "/home/vincent/venv/cms/lib/python3.4/site-packages/django/forms/fields.py" in __init__
  229.         super(CharField, self).__init__(*args, **kwargs)

Exception Type: TypeError at /fr/admin/plan/lieu/add/
Exception Value: __init__() got an unexpected keyword argument 'geom_type'