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But for the last three nights, someone had been bending the rules.

Leo smiled. He opened a new terminal and manually reduced the three rows to one. Then he added a note to the user's account: "Loyal customer. Approved for second pair on next restock. Also, nice race condition." add-cart.php num

Leo clicked through to the checkout table. The order hadn't been placed yet. But the cart's total? $1,197.00. The user had effectively bypassed the "max 1 per customer" rule without triggering a single alarm. Not a hack. Not an SQL injection. Just the ugly poetry of concurrency. But for the last three nights, someone had

Three separate line items for the same boot. Quantity: 1. Three times. But for the last three nights