[fix] UR error on contact creation

models/res_partner.py

@@ -503,6 +503,7 @@ class ScopPartner(models.Model):
 
     @api.onchange('parent_id')
     def _onchange_parent_id(self):
+        if self.parent_id.ur_id:
             self.ur_id = self.parent_id.ur_id
 
     @api.onchange('ur_id')