diff --git a/taiga/projects/api.py b/taiga/projects/api.py
index c2abb326..8d36ed25 100644
--- a/taiga/projects/api.py
+++ b/taiga/projects/api.py
@@ -602,7 +602,7 @@ class UserStoryDueDateViewSet(BlockedByProjectMixin, ModelCrudViewSet):
     def pre_delete(self, obj):
         if obj.by_default:
             raise exc.BadRequest(
-                _("You can't delete user story by default due date"))
+                _("You can't delete user story due date by default"))
 
     @list_route(methods=["POST"])
     def create_default(self, request, **kwargs):
@@ -676,6 +676,11 @@ class TaskDueDateViewSet(BlockedByProjectMixin, ModelCrudViewSet):
         with advisory_lock("task-due-date-creation-{}".format(project_id)):
             return super().create(request, *args, **kwargs)
 
+    def pre_delete(self, obj):
+        if obj.by_default:
+            raise exc.BadRequest(
+                _("You can't delete task due date by default"))
+
     @list_route(methods=["POST"])
     def create_default(self, request, **kwargs):
         context = {
@@ -812,6 +817,11 @@ class IssueDueDateViewSet(BlockedByProjectMixin, ModelCrudViewSet):
         with advisory_lock("issue-due-date-creation-{}".format(project_id)):
             return super().create(request, *args, **kwargs)
 
+    def pre_delete(self, obj):
+        if obj.by_default:
+            raise exc.BadRequest(
+                _("You can't delete issue due date by default"))
+
     @list_route(methods=["POST"])
     def create_default(self, request, **kwargs):
         context = {
diff --git a/tests/integration/test_projects.py b/tests/integration/test_projects.py
index 45f21941..cc0e896a 100644
--- a/tests/integration/test_projects.py
+++ b/tests/integration/test_projects.py
@@ -2341,34 +2341,8 @@ def test_prevent_create_us_default_due_dates_when_already_exists(client):
     assert project.us_duedates.count() == 1
 
 
-def test_create_issue_default_due_dates(client):
-    project = f.create_project()
-
-    issue_duedates = [{
-        "name": 'Default',
-        "slug": 'default',
-        "by_default": True,
-        'color': '#0000',
-        'days_to_due': None,
-        'order': 0,
-    }]
-    creation_template = project.creation_template
-    creation_template.issue_duedates = issue_duedates
-    creation_template.save()
-
-    f.MembershipFactory(user=project.owner, project=project, is_admin=True)
-    url = reverse('issue-due-dates-create-default')
-    data = {"project_id": project.pk}
-    client.login(project.owner)
-
-    response = client.json.post(url, json.dumps(data))
-
-    assert response.status_code == 200
-    assert project.issue_duedates.count() == 1
-
-
-def test_prevent_create_issue_default_due_dates_when_already_exists(client):
-    issue_duedates = [{
+def test_prevent_delete_us_default_due_dates(client):
+    us_duedates = [{
         "name": 'Default',
         "slug": 'default',
         "by_default": True,
@@ -2377,18 +2351,17 @@ def test_prevent_create_issue_default_due_dates_when_already_exists(client):
         'order': 0,
     }]
     f.ProjectTemplateFactory.create(
-        slug=settings.DEFAULT_PROJECT_TEMPLATE, issue_duedates=issue_duedates)
+        slug=settings.DEFAULT_PROJECT_TEMPLATE, us_duedates=us_duedates)
     project = f.create_project()
 
     f.MembershipFactory(user=project.owner, project=project, is_admin=True)
-    url = reverse('issue-due-dates-create-default')
-    data = {"project_id": project.pk}
+    url = reverse('userstory-due-dates-detail', kwargs={"pk": 1})
     client.login(project.owner)
 
-    response = client.json.post(url, json.dumps(data))
+    response = client.json.delete(url)
 
     assert response.status_code == 400
-    assert project.issue_duedates.count() == 1
+    assert project.us_duedates.count() == 1
 
 
 def test_create_task_default_due_dates(client):
@@ -2439,3 +2412,99 @@ def test_prevent_create_task_default_due_dates_when_already_exists(client):
 
     assert response.status_code == 400
     assert project.task_duedates.count() == 1
+
+
+def test_prevent_delete_task_default_due_dates(client):
+    task_duedates = [{
+        "name": 'Default',
+        "slug": 'default',
+        "by_default": True,
+        'color': '#0000',
+        'days_to_due': None,
+        'order': 0,
+    }]
+    f.ProjectTemplateFactory.create(
+        slug=settings.DEFAULT_PROJECT_TEMPLATE, task_duedates=task_duedates)
+    project = f.create_project()
+
+    f.MembershipFactory(user=project.owner, project=project, is_admin=True)
+    url = reverse('task-due-dates-detail', kwargs={"pk": 1})
+    client.login(project.owner)
+
+    response = client.json.delete(url)
+
+    assert response.status_code == 400
+    assert project.task_duedates.count() == 1
+
+
+def test_create_issue_default_due_dates(client):
+    project = f.create_project()
+
+    issue_duedates = [{
+        "name": 'Default',
+        "slug": 'default',
+        "by_default": True,
+        'color': '#0000',
+        'days_to_due': None,
+        'order': 0,
+    }]
+    creation_template = project.creation_template
+    creation_template.issue_duedates = issue_duedates
+    creation_template.save()
+
+    f.MembershipFactory(user=project.owner, project=project, is_admin=True)
+    url = reverse('issue-due-dates-create-default')
+    data = {"project_id": project.pk}
+    client.login(project.owner)
+
+    response = client.json.post(url, json.dumps(data))
+
+    assert response.status_code == 200
+    assert project.issue_duedates.count() == 1
+
+
+def test_prevent_create_issue_default_due_dates_when_already_exists(client):
+    issue_duedates = [{
+        "name": 'Default',
+        "slug": 'default',
+        "by_default": True,
+        'color': '#0000',
+        'days_to_due': None,
+        'order': 0,
+    }]
+    f.ProjectTemplateFactory.create(
+        slug=settings.DEFAULT_PROJECT_TEMPLATE, issue_duedates=issue_duedates)
+    project = f.create_project()
+
+    f.MembershipFactory(user=project.owner, project=project, is_admin=True)
+    url = reverse('issue-due-dates-create-default')
+    data = {"project_id": project.pk}
+    client.login(project.owner)
+
+    response = client.json.post(url, json.dumps(data))
+
+    assert response.status_code == 400
+    assert project.issue_duedates.count() == 1
+
+
+def test_prevent_delete_issue_default_due_dates(client):
+    issue_duedates = [{
+        "name": 'Default',
+        "slug": 'default',
+        "by_default": True,
+        'color': '#0000',
+        'days_to_due': None,
+        'order': 0,
+    }]
+    f.ProjectTemplateFactory.create(
+        slug=settings.DEFAULT_PROJECT_TEMPLATE, issue_duedates=issue_duedates)
+    project = f.create_project()
+
+    f.MembershipFactory(user=project.owner, project=project, is_admin=True)
+    url = reverse('issue-due-dates-detail', kwargs={"pk": 1})
+    client.login(project.owner)
+
+    response = client.json.delete(url)
+
+    assert response.status_code == 400
+    assert project.issue_duedates.count() == 1