diff --git a/bookie/src/app/sales/bill.service.ts b/bookie/src/app/sales/bill.service.ts
index c9bd788..1a2d660 100644
--- a/bookie/src/app/sales/bill.service.ts
+++ b/bookie/src/app/sales/bill.service.ts
@@ -184,7 +184,7 @@ export class BillService {
     const old = newKot.inventories.find(
       (x) => x.product.id === item.productId && x.isHappyHour === item.isHappyHour,
     ) as Inventory;
-    if (item.quantity > 1 || (canEdit && this.minimum(item.productId as string, item.isHappyHour) >= 1)) {
+    if (item.quantity >= 1 || (canEdit && this.minimum(item.productId as string, item.isHappyHour) >= 1)) {
       old.quantity -= 1;
     } else if (item.quantity === 0) {
       newKot.inventories.splice(newKot.inventories.indexOf(old), 1);