Error when searching recommendations from admin

[njoyard]

Environment:

Request Method: GET
Request URL: http://localhost:8000/admin/representatives_recommendations/recommendation/?q=plop

Django Version: 1.8.14
Python Version: 2.7.10
Installed Applications:
('dal',
 'dal_select2',
 'suit',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'django.contrib.sites',
 'compressor',
 'bootstrap3',
 'datetimewidget',
 'django_filters',
 'fontawesome',
 'rest_framework',
 'taggit',
 'core',
 'memopol',
 'memopol_scores',
 'memopol_settings',
 'memopol_themes',
 'representatives',
 'representatives_votes',
 'representatives_recommendations',
 'representatives_positions',
 'debug_toolbar')
Installed Middleware:
(u'debug_toolbar.middleware.DebugToolbarMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.contrib.sites.middleware.CurrentSiteMiddleware')

Traceback:
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper
  618.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  110.                     response = view_func(request, *args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  57.         response = view_func(request, *args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
  233.             return view(request, *args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper
  34.             return bound_func(*args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  110.                     response = view_func(request, *args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func
  30.                 return func.__get__(self, type(self))(*args2, **kwargs2)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in changelist_view
  1550.                 self.list_max_show_all, self.list_editable, self)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/views/main.py" in __init__
  81.         self.queryset = self.get_queryset(request)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/views/main.py" in get_queryset
  359.             request, qs, self.query)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in get_search_results
  991.                 queryset = queryset.filter(reduce(operator.or_, or_queries))
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/query.py" in filter
  679.         return self._filter_or_exclude(False, *args, **kwargs)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/query.py" in _filter_or_exclude
  697.             clone.query.add_q(Q(*args, **kwargs))
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in add_q
  1310.         clause, require_inner = self._add_q(where_part, self.used_aliases)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in _add_q
  1332.                     current_negated, allow_joins, split_subq)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in _add_q
  1338.                     allow_joins=allow_joins, split_subq=split_subq,
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in build_filter
  1200.                                                     lookups, value)
File "/home/niko/dev/memopol/ve/local/lib/python2.7/site-packages/django/db/models/fields/related.py" in get_lookup_constraint
  1774.             raise TypeError('Related Field got invalid lookup: %s' % lookup_type)

Exception Type: TypeError at /admin/representatives_recommendations/recommendation/
Exception Value: Related Field got invalid lookup: icontains