diff --git a/python/apps/taiga/src/taiga/base/db/exceptions.py b/python/apps/taiga/src/taiga/base/db/exceptions.py
index 0d2580598..1bc36e2e6 100644
--- a/python/apps/taiga/src/taiga/base/db/exceptions.py
+++ b/python/apps/taiga/src/taiga/base/db/exceptions.py
@@ -6,6 +6,7 @@
 # Copyright (c) 2023-present Kaleidos INC
 
 
+from django.db.models.deletion import RestrictedError  # noqa
 from django.db.utils import IntegrityError, ProgrammingError  # noqa
 
 
diff --git a/python/apps/taiga/src/taiga/commons/storage/repositories.py b/python/apps/taiga/src/taiga/commons/storage/repositories.py
index 4227db2b8..244ae5a1f 100644
--- a/python/apps/taiga/src/taiga/commons/storage/repositories.py
+++ b/python/apps/taiga/src/taiga/commons/storage/repositories.py
@@ -9,6 +9,7 @@
 from typing import TypedDict
 from uuid import UUID
 
+from taiga.base.db.exceptions import RestrictedError
 from taiga.base.db.models import QuerySet
 from taiga.base.utils.datetime import aware_utcnow
 from taiga.base.utils.files import File
@@ -68,9 +69,17 @@ async def list_storaged_objects(filters: StoragedObjectFilters = {}) -> list[Sto
 
 async def delete_storaged_object(
     storaged_object: StoragedObject,
-) -> None:
-    await storaged_object.adelete()
-    storaged_object.file.delete(save=False)
+) -> bool:
+    try:
+        await storaged_object.adelete()
+        storaged_object.file.delete(save=False)
+        return True
+    except RestrictedError:
+        # This happens when you try to delete a StoragedObject that is being used by someone
+        # (using ForeignKey with on_delete=PROTECT).
+
+        # TODO: log this
+        return False
 
 
 def mark_storaged_object_as_deleted(
diff --git a/python/apps/taiga/src/taiga/commons/storage/services.py b/python/apps/taiga/src/taiga/commons/storage/services.py
index 915a6c4f5..75e744aee 100644
--- a/python/apps/taiga/src/taiga/commons/storage/services.py
+++ b/python/apps/taiga/src/taiga/commons/storage/services.py
@@ -12,8 +12,9 @@
 
 async def clean_deleted_storaged_objects(before: datetime) -> int:
     storaged_objects = await storage_repositories.list_storaged_objects(filters={"deleted_before": before})
-
+    deleted = 0
     for storaged_object in storaged_objects:
-        await storage_repositories.delete_storaged_object(storaged_object=storaged_object)
+        if storage_repositories.delete_storaged_object(storaged_object=storaged_object):
+            deleted += 1
 
-    return len(storaged_objects)
+    return deleted
diff --git a/python/apps/taiga/tests/conf_django.py b/python/apps/taiga/tests/conf_django.py
index 462b47cb7..1fffa0d54 100644
--- a/python/apps/taiga/tests/conf_django.py
+++ b/python/apps/taiga/tests/conf_django.py
@@ -8,7 +8,8 @@
 
 import os
 
-from taiga.base.django.settings import *  # noqa, pylint: disable=unused-wildcard-import
+from taiga.base.django.settings import *  # noqa
+from taiga.base.django.settings import INSTALLED_APPS
 
 DEBUG = True
 
@@ -16,9 +17,12 @@
 STATIC_ROOT = "/tmp/taiga/static"
 
 
-INSTALLED_APPS += [  # noqa: F405
-    "tests.samples.occ",
-]
+INSTALLED_APPS = [
+    # NOTE: We should add sample apps first because pytest-django uses an strange strategy to load models to the db and
+    #       it causes integrity errors with foreign keys and many to many fields
+    "tests.samples.test_occ",
+    "tests.samples.test_storage",
+] + INSTALLED_APPS
 
 
 # This is only for GitHubActions
diff --git a/python/apps/taiga/tests/conftest.py b/python/apps/taiga/tests/conftest.py
index cd0801e65..1a8e72fa3 100644
--- a/python/apps/taiga/tests/conftest.py
+++ b/python/apps/taiga/tests/conftest.py
@@ -55,9 +55,11 @@ def django_db_setup(django_db_setup, django_db_blocker):
 
 @pytest_asyncio.fixture(scope="session", autouse=True)
 async def connect_events_manage_on_startup():
-    from taiga.events import connect_events_manager
+    from taiga.events import connect_events_manager, disconnect_events_manager
 
     await connect_events_manager()
+    yield
+    await disconnect_events_manager()
 
 
 #
@@ -65,7 +67,6 @@ async def connect_events_manage_on_startup():
 #
 def pytest_addoption(parser):
     parser.addoption("--slow_only", action="store_true", default=False, help="run slow tests only")
-
     parser.addoption("--fast_only", action="store_true", default=False, help="exclude slow tests")
 
 
diff --git a/python/apps/taiga/tests/integration/taiga/base/occ/test_repositories.py b/python/apps/taiga/tests/integration/taiga/base/occ/test_repositories.py
index 07a542819..70eee8365 100644
--- a/python/apps/taiga/tests/integration/taiga/base/occ/test_repositories.py
+++ b/python/apps/taiga/tests/integration/taiga/base/occ/test_repositories.py
@@ -7,7 +7,7 @@
 
 import pytest
 from taiga.base.occ import repositories
-from tests.samples.occ.models import SampleOCCItem
+from tests.samples.test_occ.models import SampleOCCItem
 
 pytestmark = pytest.mark.django_db(transaction=True)
 
diff --git a/python/apps/taiga/tests/integration/taiga/commons/storage/test_repositories.py b/python/apps/taiga/tests/integration/taiga/commons/storage/test_repositories.py
index 28d42d4e4..13b41c76c 100644
--- a/python/apps/taiga/tests/integration/taiga/commons/storage/test_repositories.py
+++ b/python/apps/taiga/tests/integration/taiga/commons/storage/test_repositories.py
@@ -12,6 +12,7 @@
 from asgiref.sync import sync_to_async
 from taiga.base.utils.datetime import aware_utcnow
 from taiga.commons.storage import repositories
+from tests.samples.test_storage.models import SampleAttachment
 from tests.utils import factories as f
 
 pytestmark = pytest.mark.django_db(transaction=True)
@@ -87,6 +88,27 @@ async def test_delete_storaged_object():
     assert not storage.exists(file_path)
 
 
+async def test_delete_storaged_object_that_has_been_used():
+    storaged_object = await f.create_storaged_object()
+    file_path = storaged_object.file.path
+    storage = storaged_object.file.storage
+
+    await SampleAttachment.objects.acreate(storaged_object=storaged_object)
+
+    assert len(await repositories.list_storaged_objects()) == 1
+    assert storage.exists(file_path)
+
+    assert not await repositories.delete_storaged_object(storaged_object=storaged_object)
+
+    assert len(await repositories.list_storaged_objects()) == 1
+    assert storage.exists(file_path)
+
+
+##########################################################
+# mark_storaged_object_as_deleted
+##########################################################
+
+
 async def test_mark_storaged_object_as_deleted():
     storaged_object = await f.create_storaged_object()
 
diff --git a/python/apps/taiga/tests/samples/occ/__init__.py b/python/apps/taiga/tests/samples/test_occ/__init__.py
similarity index 100%
rename from python/apps/taiga/tests/samples/occ/__init__.py
rename to python/apps/taiga/tests/samples/test_occ/__init__.py
diff --git a/python/apps/taiga/tests/samples/occ/models.py b/python/apps/taiga/tests/samples/test_occ/models.py
similarity index 100%
rename from python/apps/taiga/tests/samples/occ/models.py
rename to python/apps/taiga/tests/samples/test_occ/models.py
diff --git a/python/apps/taiga/tests/samples/test_storage/__init__.py b/python/apps/taiga/tests/samples/test_storage/__init__.py
new file mode 100644
index 000000000..87d9a5256
--- /dev/null
+++ b/python/apps/taiga/tests/samples/test_storage/__init__.py
@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# Copyright (c) 2023-present Kaleidos INC
diff --git a/python/apps/taiga/tests/samples/test_storage/models.py b/python/apps/taiga/tests/samples/test_storage/models.py
new file mode 100644
index 000000000..556bc17bd
--- /dev/null
+++ b/python/apps/taiga/tests/samples/test_storage/models.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# Copyright (c) 2023-present Kaleidos INC
+
+from taiga.base.db import models
+
+
+class SampleAttachment(models.Model):
+    storaged_object = models.ForeignKey(
+        "storage.StoragedObject",
+        null=False,
+        blank=False,
+        on_delete=models.RESTRICT,
+        related_name="+",
+    )