diff --git a/jarvis/followup/views_chrono.py b/jarvis/followup/views_chrono.py
index 7ead280..25efbd4 100644
--- a/jarvis/followup/views_chrono.py
+++ b/jarvis/followup/views_chrono.py
@@ -128,21 +128,31 @@ def remove_jump_chrono_value(request):
 @require_http_methods(["POST"])
 def add_jump_chrono_value(request):
     """
-    Recoit trois informations permettant d'ajouter le chrono d'un saut à un chrono.
+    Receives three pieces of information to add the time of a jump to a <Chrono> record.
     """
-    chrono_id = request.POST.get("chrono_id", None)
-    order = request.POST.get("order", None)
-    value = request.POST.get("value", None)
+    chrono_id = request.POST.get("chrono_id")
+    order = request.POST.get("order")
+    value = request.POST.get("value")
 
+    # Validate required parameters
+    if not chrono_id or not order or value is None:
+        return HttpResponse(400, "Missing required parameters.")
+
+    # Retrieve the Chrono object or return 404 if not found
     chrono = get_object_or_404(Chrono, pk=chrono_id)
+
+    # Attempt to create a new ChronoDetails record
     row, created = ChronoDetails.objects.get_or_create(
+        # chrono=chrono, order=order, defaults={'value': value}
         chrono=chrono, order=order, value=value
     )
 
+    # Check if the record was created or just retrieved
     if created:
-        return HttpResponse(200, (row, created))  # devrait être un 201
-
-    return HttpResponse(400, (row, created))
+        return HttpResponse(201, f"New chrono detail added: {row}")  # 201 Created
+    else:
+        # If the record was not created, it means it already exists with the same order and chrono
+        return HttpResponse(409, f"Chrono detail already exists: {row}")  # 409 Conflict
 
 
 @login_required