diff --git a/taiga/base/api/permissions.py b/taiga/base/api/permissions.py
index b03d6c18..ec994b0b 100644
--- a/taiga/base/api/permissions.py
+++ b/taiga/base/api/permissions.py
@@ -20,7 +20,6 @@ import abc
 
 from functools import reduce
 
-from taiga.base.utils import sequence as sq
 from taiga.permissions.services import user_has_perm, is_project_admin
 from django.apps import apps
 
@@ -112,7 +111,7 @@ class Not(PermissionOperator):
         super().__init__(component)
 
     def check_permissions(self, *args, **kwargs):
-        component = sq.first(self.components)
+        component = self.components[0]
         return (not component.check_permissions(*args, **kwargs))
 
 
diff --git a/taiga/base/utils/sequence.py b/taiga/base/utils/sequence.py
deleted file mode 100644
index 4e0c3e24..00000000
--- a/taiga/base/utils/sequence.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (C) 2014-2016 Andrey Antukh <niwi@niwi.nz>
-# Copyright (C) 2014-2016 Jesús Espino <jespinog@gmail.com>
-# Copyright (C) 2014-2016 David Barragán <bameda@dbarragan.com>
-# Copyright (C) 2014-2016 Alejandro Alonso <alejandro.alonso@kaleidos.net>
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-
-def first(iterable):
-    if len(iterable) == 0:
-        return None
-    return iterable[0]
-
-
-def next(data:list):
-    return data[1:]
-
-
-def arithmetic_progression(step=1, start=1):
-    i = start
-    while True:
-        yield i
-        i += step
diff --git a/taiga/projects/models.py b/taiga/projects/models.py
index f6f6cc52..c23fcc4b 100644
--- a/taiga/projects/models.py
+++ b/taiga/projects/models.py
@@ -35,7 +35,6 @@ from taiga.base.utils.time import timestamp_ms
 from taiga.projects.tagging.models import TaggedMixin
 from taiga.projects.tagging.models import TagsColorsdMixin
 from taiga.base.utils.files import get_file_path
-from taiga.base.utils.sequence import arithmetic_progression
 from taiga.base.utils.slug import slugify_uniquely
 from taiga.base.utils.slug import slugify_uniquely_for_queryset
 
@@ -287,14 +286,8 @@ class Project(ProjectDefaults, TaggedMixin, TagsColorsdMixin, models.Model):
 
         if not self.slug:
             with advisory_lock("project-creation"):
-                base_name = "{}-{}".format(self.owner.username, self.name)
-                base_slug = slugify_uniquely(base_name, self.__class__)
-                slug = base_slug
-                for i in arithmetic_progression():
-                    if not type(self).objects.filter(slug=slug).exists() or i > 100:
-                        break
-                    slug = "{}-{}".format(base_slug, i)
-                self.slug = slug
+                base_slug = "{}-{}".format(self.owner.username, self.name)
+                self.slug = slugify_uniquely(base_slug, self.__class__)
                 super().save(*args, **kwargs)
         else:
             super().save(*args, **kwargs)