diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 878c0532..24726a46 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -329,6 +329,7 @@ class UploadSnapshotForm(SnapshotMixin, FlaskForm):
             self.version = snapshot_json.get('schema_api')
             self.uuid = snapshot_json.get('uuid')
             self.sid = snapshot_json.get('sid')
+            # import pdb; pdb.set_trace()
 
             if snapshot_json.get('hwmd'):
                 schema_api = snapshot_json.get('schema_api')
diff --git a/ereuse_devicehub/parser/schemas.py b/ereuse_devicehub/parser/schemas.py
index 12ba2ad0..4dbdb106 100644
--- a/ereuse_devicehub/parser/schemas.py
+++ b/ereuse_devicehub/parser/schemas.py
@@ -27,21 +27,23 @@ class Test(MarshmallowSchema):
 
 class Steps(MarshmallowSchema):
     num = Integer(data_key='step', required=True)
-    start_time = DateTime(data_key='date_init', required=True)
-    end_time = DateTime(data_key='date_end', required=True)
+    start_time = DateTime(data_key='date_init', required=False)
+    end_time = DateTime(data_key='date_end', required=False)
     severity = EnumField(Severity)
 
     @pre_load
     def preload_datas(self, data: dict):
         data['severity'] = Severity.Info.name
-
-        if not data.pop('success', False):
-            data['severity'] = Severity.Error.name
         data.pop('duration', None)
         data.pop('commands', None)
 
+        if not data.pop('success', False):
+            data['severity'] = Severity.Error.name
+
         if data.get('date_init'):
             data['date_init'] = datetime.fromtimestamp(data['date_init']).isoformat()
+
+        if data.get('date_end'):
             data['date_end'] = datetime.fromtimestamp(data['date_end']).isoformat()