diff --git a/addons/pos_self_order_sale/models/product_product.py b/addons/pos_self_order_sale/models/product_product.py
index 05654e8d14a..f3b68cbbe9a 100644
--- a/addons/pos_self_order_sale/models/product_product.py
+++ b/addons/pos_self_order_sale/models/product_product.py
@@ -9,5 +9,8 @@ class ProductProduct(models.Model):
     def _get_product_for_ui(self, pos_config):
         self.ensure_one()
         product = super()._get_product_for_ui(pos_config)
-        product["optional_product_ids"] = self.optional_product_ids.product_variant_ids.ids
+
+        if "optional_product_ids" in self.env["product.product"]:
+            product["optional_product_ids"] = self.optional_product_ids.product_variant_ids.ids
+
         return product