diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index 6a8816fffb0..ef1a95d2f6e 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -316,6 +316,7 @@ class SaleOrder(models.Model):
         """ For service and consumable, we only take the min dates. This method is extended in sale_stock to
             take the picking_policy of SO into account.
         """
+        self.mapped("order_line")  # Prefetch indication
         for order in self:
             dates_list = []
             for line in order.order_line.filtered(lambda x: x.state != 'cancel' and not x._is_delivery() and not x.display_type):