Auto-adjust quantity in cart for PrestaShop 1.7 Free module

This module addresses a common friction point in the checkout process: when stock levels drop between the time a customer adds a product to their cart and when they attempt to complete their order, PrestaShop normally requires the customer to manually correct the quantity before proceeding. This module eliminates that manual step by automatically adjusting the cart quantity down to the maximum available stock and displaying an informative message to the customer explaining the change.

• Automatically reduces cart item quantities to match current available stock when stock has decreased
• Displays a clear message to the customer explaining the adjustment and the new available quantity
• Prevents customers from being blocked at checkout due to out-of-stock or over-quantity situations

This module is useful for stores with frequently changing stock levels — such as those with high order volumes or limited inventory — where the gap between cart addition and checkout can result in stock availability conflicts. It reduces checkout abandonment caused by quantity error messages and improves the overall customer experience.