diff --git a/skii/endpoint/routers/lesson.py b/skii/endpoint/routers/lesson.py
index 40dc8bf..d3fbb55 100644
--- a/skii/endpoint/routers/lesson.py
+++ b/skii/endpoint/routers/lesson.py
@@ -38,7 +38,7 @@ def record_create(request: HttpRequest, payload: RouterSaveContract):
 
 
 @router.get(
-    path="/read/{pk}/",
+    path="/fetch/{pk}/",
     response={
         200: RouterContract,
         422: FormInvalidResponseContract,
@@ -57,13 +57,7 @@ def record_read(request: HttpRequest, pk: IntStrUUID4):
 )
 def record_update(request: HttpRequest, pk: IntStrUUID4, payload: RouterSaveContract):
     record_payload = payload.dict()
-    if "coordinate" in record_payload:
-        geo_coordinate = record_payload["coordinate"]
-        del record_payload["coordinate"]
-        geo_coordinate_obj, created = GeoCoordinate.objects.update_or_create(
-            geo_coordinate, **geo_coordinate
-        )
-        record_payload["coordinate"] = geo_coordinate_obj
+
     record = get_object_or_404(RouterModel, pk=pk)
     for attr, value in record_payload.items():
         setattr(record, attr, value)
@@ -72,7 +66,7 @@ def record_update(request: HttpRequest, pk: IntStrUUID4, payload: RouterSaveCont
     return 200, record
 
 
-@router.get(
+@router.delete(
     path="/delete/{pk}/",
     response={
         200: SkiiMsgContract,
@@ -83,7 +77,7 @@ def record_delete(request: HttpRequest, pk: IntStrUUID4):
     qs = RouterModel.objects.all().filter(pk=pk)
     if qs.exists():
         qs.delete()
-    return 200, SkiiMsgContract(message="Record deleted")
+    return 200, SkiiMsgContract(message="OK")
 
 
 @router.get(
@@ -95,6 +89,3 @@ def record_delete(request: HttpRequest, pk: IntStrUUID4):
 )
 def record_list(request: HttpRequest):
     return 200, RouterModel.objects.all()
-
-
-__all__ = [router]
diff --git a/skii/platform/factories/factories.py b/skii/platform/factories/factories.py
index fea2583..d0bd180 100644
--- a/skii/platform/factories/factories.py
+++ b/skii/platform/factories/factories.py
@@ -157,21 +157,22 @@ class LessonFactory(factory.django.DjangoModelFactory):
     class Meta:
         model = LessonEvent
 
-    label = factory.Faker("text")
+    label = factory.Faker("text", max_nb_chars=80)
+    description = factory.Faker("text", max_nb_chars=255)
     teacher = factory.SubFactory(TeacherAgentFactory)
     start = fuzzy.FuzzyDateTime(
         start_dt=datetime.now(tz=UTC) - timedelta(hours=2),
         end_dt=datetime.now(tz=UTC),
         force_year=2023,
         force_month=7,
-        force_day=13,
+        # force_day=13,
     )
     stop = fuzzy.FuzzyDateTime(
         start_dt=datetime.now(tz=UTC),
         end_dt=datetime.now(tz=UTC) + timedelta(hours=4),
         force_year=2023,
         force_month=7,
-        force_day=13,
+        # force_day=13,
     )
 
     @factory.post_generation
diff --git a/skii/platform/migrations/0003_remove_lessonevent_check_no_overlap_and_more.py b/skii/platform/migrations/0003_remove_lessonevent_check_no_overlap_and_more.py
new file mode 100644
index 0000000..75371ea
--- /dev/null
+++ b/skii/platform/migrations/0003_remove_lessonevent_check_no_overlap_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 4.2.6 on 2023-10-05 00:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("platform", "0002_rename_uuid_lessonevent_guid_and_more"),
+    ]
+
+    operations = [
+        migrations.RemoveConstraint(
+            model_name="lessonevent",
+            name="check_no_overlap",
+        ),
+        migrations.AddConstraint(
+            model_name="lessonevent",
+            constraint=models.CheckConstraint(
+                check=models.Q(("start__lt", models.F("stop"))), name="check_no_overlap"
+            ),
+        ),
+    ]
diff --git a/skii/platform/models/event.py b/skii/platform/models/event.py
index 67d0212..fc8672b 100644
--- a/skii/platform/models/event.py
+++ b/skii/platform/models/event.py
@@ -23,12 +23,6 @@ class Meta:
             CheckConstraint(
                 check=(
                     Q(start__lt=F("stop"))
-                    & ~Q(  # Vérifie que start est inférieur à stop
-                        start__range=(F("start"), F("stop"))
-                    )
-                    & ~Q(  # Vérifie qu'il n'y a pas de chevauchement
-                        stop__range=(F("start"), F("stop"))
-                    )  # Vérifie qu'il n'y a pas de chevauchement
                 ),
                 name="check_no_overlap",
             ),
@@ -50,12 +44,12 @@ def gant_config(self):
 
         return GanttConfigContract(
             **{
-                "start": self.start.strftime(format="%Y-%m-%d %H:%M"),
-                "stop": self.stop.strftime(format="%Y-%m-%d %H:%M"),
+                "startGant": self.start.strftime(format="%Y-%m-%d %H:%M"),
+                "stopGant": self.stop.strftime(format="%Y-%m-%d %H:%M"),
                 "ganttBarConfig": {
-                    "id": str(self.uuid),
+                    "id": str(self.short_prefix_guid),
                     "hasHandles": True,
-                    "label": self.title,
+                    "label": self.label,
                     "style": {
                         "background": "#e09b69",
                         "color": "black",
diff --git a/tests/endpoint/test_api.py b/tests/endpoint/test_api.py
index a3c1ec6..e625080 100644
--- a/tests/endpoint/test_api.py
+++ b/tests/endpoint/test_api.py
@@ -100,4 +100,14 @@ class TestApiLesson(TestApiTeacher):
     api_save_contract = LessonSaveContract
 
     api_route_namespace = "lesson"
-    fields = []
+    fields = [
+        'pk',
+        'gant_config',
+        'start',
+        'stop',
+        'teacher',
+        'students',
+        'label',
+        'description'
+    ]
+