Sale Order Restrict Copy Archived Product

This module adds a safety check to the duplication of sales orders in Odoo.

When a user tries to duplicate a sales order (for example with the Duplicate action), the system looks at every product used on the order lines. If at least one of those products is archived (no longer active), the duplication is stopped and an error message appears listing the archived product names.

• The check applies to each selected sales order.
• The error message names the archived products involved, so the user knows what to fix.
• If all products on the order are still active, the duplication works exactly as before.

The module only touches the sales order model sale.order and its duplication behaviour. It does not add menus, buttons, reports or scheduled jobs, and it does not change prices, stock or any other sales rules. Its purpose is to avoid creating new sales orders that reference products that have been archived and are no longer sellable.