diff --git a/plugins/tps/shops/models/sale/fields.yaml b/plugins/tps/shops/models/sale/fields.yaml
index 624f07d..63c905d 100755
--- a/plugins/tps/shops/models/sale/fields.yaml
+++ b/plugins/tps/shops/models/sale/fields.yaml
@@ -5,6 +5,7 @@ fields:
         descriptionFrom: description
         span: auto
         type: relation
+        emptyOption: None
     type:
         label: Type
         options: