General FAQ

(This section only applies to users of the Multi-Stock Store module.)

Sometimes, an inconsistency may occur between the total stock managed by PrestaShop and the stock assigned to a specific store.

When this happens, a warning message appears in the Stock tab of the product sheet:

It is often very difficult to identify what triggered the inconsistency (e.g., leftover quantity in the database, converting a product with combinations into a simple product, incorrect handling of order statuses, a brief PrestaShop connection issue during a transaction, etc.).

The best approach is to review the affected products and manually reset them directly from the product page by following this procedure:

1) In the Stock tab, click the button, then click

2) In the Quantities tab (or Combinations), set the stock(s) to 0, then click

3) In the Smart Stock module (accessible via the Shop Manager, under the Stock In/Out menu), assign the stock quantities to each store.

Note: You can also go to the Stock tab of the product sheet, manually enter the quantities for each store, and then click

If needed, Prestatill can provide you with a custom database query listing all products affected by this inconsistency.

Recommended reading: Understanding Order Statuses

It may happen that you notice positive or negative stock movements without any apparent reason, as if they occurred on their own.

In 99% of cases, these “phantom” movements can be explained by the following scenario:

1️⃣ Creating or editing a product sheet
In the first browser tab, an employee creates a new product sheet (with initial stock at 0) or edits an existing one (with current stock levels). He saves the sheet at this stage.

2️⃣ Adding or removing stock via Smart Stock
In a second tab (or even on another computer), the employee opens the Stock In/Out submenu in Smart Stock and adjusts the stock levels (for example, to make a product immediately available for sale in the POS).

3️⃣ Returning to the original product sheet
The employee then goes back to the first tab, completes the product sheet (images, descriptions, other information), and saves it again. This is when the phantom stock movement occurs.

Why? Because the browser did not refresh the product tab with the updated stock from Smart Stock. When the employee saves the product sheet again, the stock state reverts to the value known in step 1, thereby undoing or overwriting the changes made in step 2. This creates an unexpected positive or negative stock movement.

👉 Note: This issue can also occur between two different computers, not just in two tabs of the same browser.

How to avoid this issue?

To ensure reliable stock management, always make sure the product sheet is closed on all browsers and devices before making any stock movements. This will prevent any desynchronization between screens and ensure that the latest adjustments are correctly applied.