diff --git a/policy/services.py b/policy/services.py
index fcacc26..59cf9f0 100644
--- a/policy/services.py
+++ b/policy/services.py
@@ -41,7 +41,9 @@ def __init__(self, user):
         self.user = user
 
     @register_service_signal('policy_service.create_or_update')
-    def update_or_create(self, data, user):
+    def update_or_create(self, data, user): 
+        if isinstance(data['enroll_date'], str):
+            data['enroll_date'] = py_date.strptime(data['enroll_date'], "%Y-%m-%d")
         policy_uuid = data.get('uuid', None)
         if 'enroll_date' in data and data['enroll_date'] > py_date.today():
             raise ValidationError("policy.enroll_date_in_the_future")
diff --git a/policy/tests_gql.py b/policy/tests_gql.py
index 048c14e..f689f3c 100644
--- a/policy/tests_gql.py
+++ b/policy/tests_gql.py
@@ -3,7 +3,7 @@
 from dataclasses import dataclass
 from core.utils import filter_validity
 from core.models import User
-from core.test_helpers import create_test_interactive_user
+from core.test_helpers import create_test_interactive_user, AssertMutation
 from django.conf import settings
 from medical.models import Service 
 from graphene_django.utils.testing import GraphQLTestCase
@@ -38,7 +38,7 @@ class PolicyGraphQLTestCase(GraphQLTestCase):
     # is shown as an error in the IDE, so leaving it as True.
     GRAPHQL_SCHEMA = True
     admin_user = None
-
+  
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
@@ -317,3 +317,32 @@ def test_insuree_policy_query(self):
         # Add some more asserts if you like
         ...
 
+    def test_mutation_simple(self):
+        muuid = "203327cd-501e-41e1-a026-ed742e360081"
+        response = self.query(
+            f'''
+    mutation {{
+      createPolicy(
+        input: {{
+          clientMutationId: "{muuid}"
+          clientMutationLabel: "Création de la police ttttt eeeee (123123123) - 2024-06-01 : 2025-05-31"
+          
+          enrollDate: "2024-04-07"
+            startDate: "2024-06-01"
+            expiryDate: "2025-05-31"
+            value: "10000.00"
+            productId: {self.product.id}
+            familyId: {self.insuree.family.id}
+            officerId: 1
+                    }}
+        ) {{
+            clientMutationId
+            internalId
+        }}
+    }}
+            ''',
+            headers={"HTTP_AUTHORIZATION": f"Bearer {self.admin_token}"},
+            variables={'chfid': self.insuree.chf_id, 'activeOrLastExpiredOnly':True}
+        )
+        content = AssertMutation(self,muuid,self.admin_token)
+