diff --git a/brewman/brewman/routers/purchase.py b/brewman/brewman/routers/purchase.py
index f49998b0..ea4dd275 100644
--- a/brewman/brewman/routers/purchase.py
+++ b/brewman/brewman/routers/purchase.py
@@ -226,7 +226,7 @@ def update_inventory(voucher: Voucher, vendor_id: uuid.UUID, new_inventories: Li
         item = voucher.inventories[it - 1]
         index = next((idx for (idx, d) in enumerate(new_inventories) if d.id_ == item.id), None)
         if index is not None:
-            new_inventory = new_inventories[index]
+            new_inventory = new_inventories.pop(index)
             product = db.execute(select(Product).where(Product.id == new_inventory.product.id_)).scalar_one()
             rc_price = rate_contract_price(product.id, vendor_id, voucher.date, db)
             if rc_price is not None and rc_price != new_inventory.rate:
@@ -258,9 +258,7 @@ def update_inventory(voucher: Voucher, vendor_id: uuid.UUID, new_inventories: Li
             item.tax = new_inventory.tax
             item.batch.tax = new_inventory.tax
             product.price = new_inventory.rate
-            new_inventories.remove(new_inventory)
             # TODO: Update all references of the batch with the new rates
-            break
         else:
             has_been_issued = db.execute(
                 select(func.count(Inventory.id)).where(Inventory.batch_id == item.batch.id, Inventory.id != item.id)