diff --git a/taiga/projects/occ/mixins.py b/taiga/projects/occ/mixins.py
index 6c254c92..727e57e6 100644
--- a/taiga/projects/occ/mixins.py
+++ b/taiga/projects/occ/mixins.py
@@ -31,7 +31,7 @@ class OCCResourceMixin(object):
         if current_version != param_version:
             raise exc.WrongArguments({"version": "The version doesn't match with the current one"})
 
-        obj.version += 1
+        obj.version = models.F('version') + 1
         super().pre_save(obj)
 
 
diff --git a/tests/integration/test_occ.py b/tests/integration/test_occ.py
index ebaf05de..8433d5aa 100644
--- a/tests/integration/test_occ.py
+++ b/tests/integration/test_occ.py
@@ -65,7 +65,7 @@ def test_invalid_concurrent_save_for_wiki_page(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    wiki_page = f.WikiPageFactory.create(project=project, owner=user)
+    wiki_page = f.WikiPageFactory.create(version=10, project=project, owner=user)
     client.login(user)
 
     url = reverse("wiki-detail", args=(wiki_page.id,))
@@ -77,7 +77,7 @@ def test_valid_concurrent_save_for_wiki_page(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    wiki_page = f.WikiPageFactory.create(project=project, owner=user)
+    wiki_page = f.WikiPageFactory.create(version=10, project=project, owner=user)
     client.login(user)
 
     url = reverse("wiki-detail", args=(wiki_page.id,))
@@ -91,7 +91,7 @@ def test_invalid_concurrent_save_for_us(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    userstory = f.UserStoryFactory.create(project=project)
+    userstory = f.UserStoryFactory.create(version=10, project=project)
     client.login(user)
 
     url = reverse("userstories-detail", args=(userstory.id,))
@@ -103,7 +103,7 @@ def test_valid_concurrent_save_for_us(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    userstory = f.UserStoryFactory.create(project=project)
+    userstory = f.UserStoryFactory.create(version=10, project=project)
     client.login(user)
 
     url = reverse("userstories-detail", args=(userstory.id,))
@@ -118,7 +118,7 @@ def test_invalid_concurrent_save_for_task(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    task = f.TaskFactory.create(project=project)
+    task = f.TaskFactory.create(version=10, project=project)
     client.login(user)
 
     mock_path = "taiga.projects.tasks.api.TaskViewSet.pre_conditions_on_save"
@@ -132,7 +132,7 @@ def test_valid_concurrent_save_for_task(client):
     user = f.UserFactory.create()
     project = f.ProjectFactory.create(owner=user)
     membership = f.MembershipFactory.create(project=project, user=user)
-    task = f.TaskFactory.create(project=project)
+    task = f.TaskFactory.create(version=10, project=project)
     client.login(user)
 
     mock_path = "taiga.projects.tasks.api.TaskViewSet.pre_conditions_on_save"