diff --git a/lemarche/tenders/tests.py b/lemarche/tenders/tests.py
index 0ee1e8c31..448c92328 100644
--- a/lemarche/tenders/tests.py
+++ b/lemarche/tenders/tests.py
@@ -24,6 +24,7 @@
 from lemarche.users.factories import UserFactory
 from lemarche.users.models import User
 from lemarche.utils.admin.admin_site import MarcheAdminSite, get_admin_change_view_url
+from lemarche.www.tenders import utils as tender_utils
 
 
 date_tomorrow = timezone.now() + timedelta(days=1)
@@ -971,3 +972,29 @@ def test_edit_form_no_matching_on_validate_submission(self):
         self.assertTrue(hasattr(tender_response, "siae_count_annotated"))
         self.assertEqual(tender_response.siae_count_annotated, 1)
         self.assertEqual(tender_response.siae_count_annotated, self.tender.tendersiae_set.count())
+
+
+class TenderUtilsTest(TestCase):
+    @classmethod
+    def setUpTestData(cls):
+        cls.user_siae = UserFactory(kind=User.KIND_SIAE)
+        cls.user_buyer = UserFactory(kind=User.KIND_BUYER)
+        cls.siae_with_tender_1 = SiaeFactory(users=[cls.user_siae])
+        siae_with_tender_2 = SiaeFactory(users=[cls.user_siae])
+        cls.sector = SectorFactory()
+        cls.tender_with_siae = TenderFactory(
+            siaes=[cls.siae_with_tender_1, siae_with_tender_2],
+            sectors=[cls.sector],
+            author=cls.user_buyer,
+            deadline_date=date_tomorrow,
+            status=tender_constants.STATUS_SENT,
+            first_sent_at=timezone.now(),
+        )
+
+    def test_duplicate(self):
+        new_tender = tender_utils.duplicate(self.tender_with_siae)
+        self.assertEqual(self.tender_with_siae.title, new_tender.title)
+        self.assertEqual(self.tender_with_siae.author, new_tender.author)
+        self.assertNotEqual(self.tender_with_siae.status, new_tender.status)
+        self.assertEqual(self.tender_with_siae.sectors().count(), new_tender.sectors().count())
+        self.assertNotEqual(self.tender_with_siae.siaes().count(), new_tender.siaes().count())
diff --git a/lemarche/www/tenders/utils.py b/lemarche/www/tenders/utils.py
index 9d063d368..9bb67f065 100644
--- a/lemarche/www/tenders/utils.py
+++ b/lemarche/www/tenders/utils.py
@@ -1,5 +1,6 @@
 from django.conf import settings
 
+from lemarche.tenders import constants as tender_constants
 from lemarche.tenders.models import Tender, TenderQuestion
 from lemarche.users import constants as user_constants
 from lemarche.users.models import User
@@ -101,7 +102,9 @@ def get_or_create_user(request_user, tender_dict: dict, source=user_constants.SO
 
 def duplicate(tender: Tender) -> Tender:
     FIELDS_TO_REMOVE = (
-        ["_state"] + ["id", "slug", "siae_transactioned", "extra_data", "import_raw_object"] + Tender.READONLY_FIELDS
+        ["_state", "_django_version"]
+        + ["id", "slug", "siae_transactioned", "extra_data", "import_raw_object"]
+        + Tender.READONLY_FIELDS
     )
     FIELDS_TO_KEEP = [field for field in tender.__dict__.keys() if field not in FIELDS_TO_REMOVE]
     # sectors  # managed post-create
@@ -111,8 +114,8 @@ def duplicate(tender: Tender) -> Tender:
         new_tender_dict[key] = tender.__dict__[key]
 
     # overwrite some fields
-    new_tender_dict["status"] = Tender.STATUS_PUBLISHED
-    new_tender_dict["source"] = Tender.SOURCE_STAFF_C4_CREATED
+    new_tender_dict["status"] = tender_constants.STATUS_PUBLISHED
+    new_tender_dict["source"] = tender_constants.SOURCE_STAFF_C4_CREATED
     new_tender_dict["logs"] = [{"action": "tender_duplicated", "from": tender.id}]
 
     # create duplicate tender