diff --git a/product_update_price_last_purchase/models/product_pricelist.py b/product_update_price_last_purchase/models/product_pricelist.py
index 2a9faa3..e568758 100644
--- a/product_update_price_last_purchase/models/product_pricelist.py
+++ b/product_update_price_last_purchase/models/product_pricelist.py
@@ -14,6 +14,7 @@ class ProductPricelist(models.Model):
         ProductProduct = self.env['product.product']
         res = super()._compute_price_rule(products_qty_partner, date=date, uom_id=uom_id)
         new_res = res.copy()
+        item_id = []
         for product_id, values in res.items():
             if values[1]:
               item_id = values[1]