diff --git a/odex25_realstate/real_estate/models/internal_property.py b/odex25_realstate/real_estate/models/internal_property.py
index 0a081a59f..29b2f82d1 100644
--- a/odex25_realstate/real_estate/models/internal_property.py
+++ b/odex25_realstate/real_estate/models/internal_property.py
@@ -30,11 +30,12 @@ class Property(models.Model):
 
     @api.model
     def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
-        res = super(PurchaseOrderCustom, self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar,
+        res = super(Property, self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar,
                                                                submenu=submenu)
         doc = etree.XML(res['arch'])
         if (view_type == 'form'):
             for node in doc.xpath("//field"):
+                modifiers = json.loads(node.get("modifiers"))
                 modifiers['readonly'] = [('state', 'in', ['approve'])]
                 node.set("modifiers", json.dumps(modifiers))
                 res['arch'] = etree.tostring(doc, encoding='unicode')