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Definition ''Physical Stock, Reserved Stock, Available Stock'

In PrestaShop versions 1.7.x, you'll find 3 different 'stock' fields, also displayed in Sc interface, and called Physical Quantity, Reserved Quantity and Available Stock.

Only 'Available Stock' is editable, the other two are in read only because they're calculated fields.

You'll find the exact definition of the 3 fields on the PrestaShop Help page, when you're on the Stock page: