→ I have thoroughly tested this exact scenario in a standard Odoo environment to verify the behavior.
→ Upon resetting the canceled Sales Order to a Quotation, adding a new product, and reconfirming it, Odoo successfully generated new delivery operations containing both the original products and the newly added product. The system completely refreshed the unfulfilled demand as expected.
Let me review your route and rule setups so I can help you
Thanks

Hello, 

Yes, the behavior you described is standard Odoo functionality.

In a 2-Step Delivery process, once the Pick operation (WH/Stock → WH/Output) is validated and marked as Done, Odoo considers that stock movement completed and does not automatically reverse it when the Sales Order is cancelled. Therefore:

• The pending Delivery operation is cancelled automatically.
• The completed Pick operation remains in Done status.
• Stock stays in WH/Output until another inventory action moves it.

For your second scenario, when the Sales Order is reset and reconfirmed, Odoo typically generates delivery orders only for newly required quantities because the original stock moves are already linked to completed operations and are considered fulfilled from a stock movement perspective.

Recommended standard process:

1. Cancel the Sales Order.
2. Create a Return Transfer from WH/Output → WH/Stock for products already picked.
3. Reset/modify the Sales Order as required.
4. Reconfirm the Sales Order.

This ensures stock availability and move chains are properly restored before creating new delivery documents.

Generally, no additional configuration is required; this is more of a process flow consideration to maintain inventory consistency.

Hope this works for you! If you need any help implementing this or want a more optimized approach, feel free to reach out for further discussion.

Regards,

Zehntech Technologies Inc.

santosh.sekwadia@zehntech.com

Yes, this is standard Odoo behavior.

When the Pick operation (WH/Stock → WH/Output) is validated, the stock move is completed and inventory is physically considered to be in the WH/Output location. Odoo does not automatically reverse completed stock moves when a Sales Order is cancelled.

Therefore:

• The completed Pick remains in Done state.

• The pending Delivery (WH/Output → Customer) is cancelled.

• Stock remains in WH/Output.

This explains why, after resetting the Sales Order to Quotation and confirming it again, Odoo only generates delivery operations for newly added products. From Odoo's perspective, the original products have already been reserved and moved as part of a completed logistics flow, so those stock moves are not recreated automatically.

If the intention is to cancel the shipment entirely and return the products to normal warehouse stock, the recommended workflow is:

1. Cancel the Sales Order.

2. Create a Return Transfer for the completed Pick operation.

   • Source: WH/Output

   • Destination: WH/Stock

3. Validate the return transfer.

This restores inventory to the stock location and creates the appropriate reverse stock moves.

If the Sales Order must then be modified and reconfirmed, the standard approach is usually:

• Return the products to stock first.

• Update the Sales Order.

• Confirm again.

This allows Odoo to generate a fresh procurement and delivery flow based on the updated order quantities and products.

In general, once a stock move is in Done state, Odoo expects corrections to be handled through return transfers rather than by cancelling and regenerating completed logistics operations. This preserves inventory traceability and stock valuation consistency.