__

## Short functional explanation of the error
When we have a subscription product that has already been sold. If we try to import a product with the same ID but where we change the subscription type of the product, the import is executed without issue. However, this leads to undesired behavior:
when we go to the product page and try to manually change the subscription type (set it back to subscription), the change is not applied as a warning is raised.

## Reproduction Steps
Make sure you have debug mode enabled.
1. Create a product, and check the Subscription box.
2. Click on Orders and create a Quotation with this product, then confirm.
3. Go to Products > Products. Select the list view and search for the product you just created. Select it, and click Actions > Export.
4. Check the import compatible field. Select the fields to export: name, id and recurring_invoice. Upon exporting, a file is downloaded.
5. Access that file and change the recurring_invoice to FAUX or FALSE if your computer is in English. Save the changes.
6. Unselect the product and click on the cog, top right > Import. Click on Upload Data File and select the file that you have downloaded upon exporting, then import.

### Expected behavior
A user warning is raised: we shouldn't be able to change the subscription type of the product when it has already been sold.

### Unexpected behavior
The import is processed normally. Then, when we access the product page, and try to check the Subscriptions box again, a warning is raised.

## Origin of the issue
Nothing prevents the import from occurring in that case.

__
opw-6143789

Forward-Port-Of: odoo/enterprise#117318
Forward-Port-Of: odoo/enterprise#115046

### Steps to reproduce:

- In the settings enable dropshipping
- Create a storable product P, enable the dropshipping and set a vendor
- Create and confirm a sale order for a field service
- Open the related task > Products > Add 1 unit of P
- Go back to the sale order > an RFQ has been created
#### > The delivered quantity of P is set to 1

### Cause of the issue:

Since 2361368acfe7fecbffde2ca26392eb89aecdc9e1 the `_inverse_fsm_quantity` method manually adapts the delivered quantity based on the fact that the `product.service_type` is `manual` rather than the `qty_delivered_method` of the line or future line is. In particular, because these lines: https://github.com/odoo/enterprise/blob/8f4fe902cb71c49bdb3caf9915f9a5abfe6f237f/industry_fsm_sale/models/product_product.py#L82-L83
provide a value of the `qty_delivered` to the created purchase order line and since the `qty_delivered_method` is a precomputed field: https://github.com/odoo/odoo/blob/fdfd9851393ff82a265997478886bcad6da357d0/addons/sale/models/sale_order_line.py#L225-L237
The fact that the purchase order line will be created with a `stock_move` `qty_delivered_method` and that the generated PO does not generate any move prior to confirmation will not trigger the dependency of the `qty_delivered` to retrigger a computation of the `delivered_qty` of the product which is suppose to be based on stock pickings: https://github.com/odoo/odoo/blob/fdfd9851393ff82a265997478886bcad6da357d0/addons/sale/models/sale_order_line.py#L871-L876 https://github.com/odoo/odoo/blob/fdfd9851393ff82a265997478886bcad6da357d0/addons/sale_stock/models/sale_order_line.py#L193-L198
Leaving the created sol with a delivered quantity of 1 prior to confirmation of the PO (which will generate move_ids related to the sol and trigger the compute).

Fix:

The changes of 2361368acfe7fecbffde2ca26392eb89aecdc9e1 regarding the `_inverse_fsm_quantity` appears unjustified with respect to the purpose of the fix. In addition, the `qty_delivered` and changes are already expected to be properly computed when the `qty_delivered_method` is not manual, particularly since the '`manual'` `service_type` is actually the default `service_type` corresponding to any 'consu' product and looks unrelated by any mean to the `delivered_qty` computation: https://github.com/odoo/odoo/blob/fdfd9851393ff82a265997478886bcad6da357d0/addons/sale/models/product_template.py#L165-L167

opw-6104326

Forward-Port-Of: odoo/enterprise#117727
Forward-Port-Of: odoo/enterprise#115760

**Steps to reproduce**
1. Create a customer invoice with Invoice Date `2025-05-27` and accounting Date `2026-05-04`.
2. On the *Other Info* tab, set the Delivery Date to `2026-05-04` and post the invoice.
3. Generate the FA(3) XML.

**Issue**
`P_6` is omitted from the payload even though the delivery date differs from the invoice issue date.

The FA(3) information sheet (Warsaw, September 2025, binding from 1 February 2026) defines `P_6` as *"the date of delivery [...] if such date is specified and differs from the date of issue of the invoice"*, where the date of issue is `P_1` (Art. 106e sec. 1 item 1 of the VAT Act). In Odoo `P_1` maps to `invoice_date`, but the template at
https://github.com/odoo/odoo/blob/4890b8021af2a5c025944220043d295bb7bbbb9b/addons/l10n_pl_edi/data/fa3_template.xml#L132 compares `delivery_date` against `invoice.date`, the accounting/entry date. When the invoice is posted on the delivery day the accounting date equals the delivery date, the guard evaluates to false, and `P_6` is wrongly dropped.

Comparing against `invoice.invoice_date` aligns the guard with `P_1` as the spec requires.

Ticket [link](https://www.odoo.com/odoo/project.task/6211119)
opw-6211119

Forward-Port-Of: odoo/odoo#266667

### Issue:
When a Sale Order is delivered but later reimbursed (e.g., via a credit note without a return), it is still considered as to invoice
As a result, it continues to impact the partner’s credit limit

### Cause:
Sale Orders remain included in the `credit_to_invoice` computation even when invoicing is manually considered finished
There was no way to exclude such orders from the credit limit calculation

### Fix:
Use the `invoicing_closed` field to mark Sale Orders as fully processed
When set, the order is excluded from the credit limit computation

### Steps to reproduce:
- Install `sale_management`
- In Settings, enable Sales Credit Limit (default: 3000)
- Create, confirm, and deliver a Sale Order for a new customer (any product, price: 2000)
- Duplicate the Sale Order → a credit warning is displayed
- Go back to the original Sale Order and use Close Invoicing from the gear menu
- Return to the duplicated Sale Order
The warning disappears as the closed order is no longer included in the credit computation

### Note:
For a complete business scenario, refer to the steps described in the related ticket

opw-6013369

Forward-Port-Of: odoo/odoo#262720

**Steps to reproduce**
1. Create a customer invoice with Invoice Date `2025-05-27` and accounting Date `2026-05-04`.
2. On the *Other Info* tab, set the Delivery Date to `2026-05-04` and post the invoice.
3. Generate the FA(3) XML.

**Issue**
`P_6` is omitted from the payload even though the delivery date differs from the invoice issue date.

The FA(3) information sheet (Warsaw, September 2025, binding from 1 February 2026) defines `P_6` as *"the date of delivery [...] if such date is specified and differs from the date of issue of the invoice"*, where the date of issue is `P_1` (Art. 106e sec. 1 item 1 of the VAT Act). In Odoo `P_1` maps to `invoice_date`, but the template at
https://github.com/odoo/odoo/blob/4890b8021af2a5c025944220043d295bb7bbbb9b/addons/l10n_pl_edi/data/fa3_template.xml#L132 compares `delivery_date` against `invoice.date`, the accounting/entry date. When the invoice is posted on the delivery day the accounting date equals the delivery date, the guard evaluates to false, and `P_6` is wrongly dropped.

Comparing against `invoice.invoice_date` aligns the guard with `P_1` as the spec requires.

Ticket [link](https://www.odoo.com/odoo/project.task/6211119)
opw-6211119

Forward-Port-Of: odoo/odoo#266667

__

## Short functional explanation of the error
When setting a time off for an employee who has a flexible schedule, in the attendance app, on the calendar with the 'days' view. We can see that the hours are grayed out from 8 hours to 16 hours. However, according to this message:
https://www.odoo.com/mail/message/1027495005
"[...] the entire day of absence might not be represented as such, which is an issue (for example if a flexible employee with 8h/day takes a day off, the duration of the leave should be 1 day/8 hours but on the gantt view everything should be gray from midnight to midnight)".
Moreover, when we select the Week or Month view on the calendar, the day off isn't grayed out. This comes from the fact that, for a flexible schedule, we consider that any time of the day can be a working hour; and we only grey out days in the calendar where no hour has been worked at all. Hence, the hours considered during a flexible day off should be from midnight to 23:59:59.

## Reproduction Steps
1. Go to an employee's profile and set their schedule to flexible.
2. Create a time off of a one-day duration for this employee.
3. Go to the attendance app and see the calendar.

### Expected behavior
When clicking on the Day view, all hours from midnight to 11pm should be grayed out.

When clicking on the Week/month view, the day of the time off should be grayed out.

### Unexpected behavior
When clicking on the Day view, hours from 8am to 4pm are grayed out.

When clicking on the Week/month view, the day of the time off isn't grayed out.

## Origin of the issue
First, we only consider the leave if the resource is fully flexible, i.e if the employee has no working calendar set:
 https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L546
However, if the schedule of the employee is flexible, the leave resource isn't considered as fully flexible, thus leading us to a leave from 8 am to 4 pm.

Moreover, when processing flexible leaves, we return the unavailable intervals with the timezone of the employee:
https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L589-L592 Whereas when we process fixed leaves, we return the unavailable intervals under utc:
https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L597-L601

This leads us to display problems: when the user is under European/ Brussels time in summer, the leave starts at 2 am and ends at 11pm, instead of starting at midnight.

Note: after discussion with AJU, it has been agreed that the behavior
should be the same on the Planning app.
__
opw-6030212



---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#256636

__

## Short functional explanation of the error
When setting a time off for an employee who has a flexible schedule, in the attendance app, on the calendar with the 'days' view. We can see that the hours are grayed out from 8 hours to 16 hours. However, according to this message:
https://www.odoo.com/mail/message/1027495005
"[...] the entire day of absence might not be represented as such, which is an issue (for example if a flexible employee with 8h/day takes a day off, the duration of the leave should be 1 day/8 hours but on the gantt view everything should be gray from midnight to midnight)".
Moreover, when we select the Week or Month view on the calendar, the day off isn't grayed out. This comes from the fact that, for a flexible schedule, we consider that any time of the day can be a working hour; and we only grey out days in the calendar where no hour has been worked at all. Hence, the hours considered during a flexible day off should be from midnight to 23:59:59.

## Reproduction Steps
1. Go to an employee's profile and set their schedule to flexible.
2. Create a time off of a one-day duration for this employee.
3. Go to the attendance app and see the calendar.

### Expected behavior
When clicking on the Day view, all hours from midnight to 11pm should be grayed out.

When clicking on the Week/month view, the day of the time off should be grayed out.

### Unexpected behavior
When clicking on the Day view, hours from 8am to 4pm are grayed out.

When clicking on the Week/month view, the day of the time off isn't grayed out.

## Origin of the issue
First, we only consider the leave if the resource is fully flexible, i.e if the employee has no working calendar set:
 https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L546
However, if the schedule of the employee is flexible, the leave resource isn't considered as fully flexible, thus leading us to a leave from 8 am to 4 pm.

Moreover, when processing flexible leaves, we return the unavailable intervals with the timezone of the employee:
https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L589-L592 Whereas when we process fixed leaves, we return the unavailable intervals under utc:
https://github.com/odoo/odoo/blob/394a30f8a2814d460cfe220b5017e7ac95d8cddc/addons/resource/models/resource_calendar.py#L597-L601

This leads us to display problems: when the user is under European/ Brussels time in summer, the leave starts at 2 am and ends at 11pm, instead of starting at midnight.
Note: after discussion with AJU, it has been agreed that the behavior
should be the same on the Planning app.
__
opw-6030212

Forward-Port-Of: odoo/enterprise#112482

__

## Short functional explanation of the error
When rescheduling the deadline only of a task that has dependencies, other dependencies won't be moved in time, even if we select `Auto-Reschedule (Keep Buffer)`.

## Reproduction Steps
1. Go to Project. On a given project, click on the 3 dots on the top right of the project card. Then, click settings and under Task Management, check Task Dependencies.
2. Create 2 tasks for this project. On task 1, click on the Deadline field, then click on the top right of the calendar card to set a planned date.
3. On task 2, click on the Blocked By tab. Then, add a line with task 1. Select a planned date like you did with task 1.
4. Go back to the project and on the top right, click on the Gantt view. Make sure that above the calendar, the Auto-Reschedule (Keep Buffer) option is selected. Then, move forward (or backward) the deadline of task 1 by only clicking on the right edge of the pill and dragging/dropping it to the left/right.

### Expected behavior
As task 2 depends on task 1, and we need to keep the buffer. The start date of task 2 should be moved left when we drop the deadline of task 1 further left, or right when we move the deadline of task 1 further right.

### Unexpected behavior
Nothing happens.

## Origin of the issue
### JS side
When we click on the whole task 1 and drag it to the right (thus changing the start date *and* the deadline), the dependent tasks are also moved right. When performing this action, this calls the method `dragPillDrop`. In it, we can see this piece of code: https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/static/src/gantt_renderer.js#L1484-L1489 where `this.isAutoPlan` indicates whether we checked the Auto-Reschedule (Keep Buffer) option. In that case, we call `rescheduleAccordingToDependency`, which performs this ORM call: https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/static/src/gantt_model.js#L500

However, when only moving the deadline of the task, we call the method `resizePillDrop`. In this method, we don't check if `this.isAutoPlan` is True, as we perform in all case the call to: https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/static/src/gantt_renderer.js#L2822 Which will trigger the orm call:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/static/src/gantt_model.js#L479 which will call the `web_gantt_write` method in Python, only writing on the task we changed the deadline of.

### PY side
Inside `web_gantt_reschedule`, to reschedule dependent tasks, we have to reach the method call:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/models/models.py#L247 However, there's a condition preventing us from reaching that code when only changing the deadline:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/models/models.py#L230-L235 Yet, we need to trigger the code and reschedule dependencies even if there's no planned date as soon as we change the deadline.

Once we're in `_web_gantt_action_reschedule_candidates`, we check if we're in the case of preponing or postponing the task (i.e the direction of the rescheduling):
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/models/models.py#L410 This call is performed with `start_date_field_name`, which is present in the `vals` in the case of moving a whole task. Yet, in our case, we only move the deadline, so `start_date_field_name` isn't in our `vals`. So, to get the direction of our rescheduling, we have to use `stop_date_field_name` instead.

Then, we perform this call:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/web_gantt/models/models.py#L412 However, in our case, the dependent tasks are still found under the `dependency_inverted_field_name` field.

This leads us to the return of the function, where we call `_web_gantt_move_candidates`. In it, we retrieve the previous values of the pill we're modifying with:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/project_enterprise/models/project_task.py#L1366 using `vals`. Later we use `start_date_field_name` to update the dates of dependent tasks:
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/project_enterprise/models/project_task.py#L1413-L1415 Still, in our case, we don't have `start_date_field_name` in vals. Thus, we have to define `old_vals_per_pill_id[self.id][start_date_field_name]`.

Next, we define the start date and end date of the intervals in which we reschedule the dependent tasks (so, the left and right bounds of intervals):
https://github.com/odoo/enterprise/blob/e113c851e6fa9a7a3c1dca840926ed7e58b3f16f/project_enterprise/models/project_task.py#L1392-L1401 In case of a `search_forward`, this is natural. Nevertheless, in the case of a backwards search, we can't consider the start date of the first task to be the right bound for our dependent tasks, as they occur after the first task! This would mean that our right bound is set before the dependent tasks even start. So, in our case of changing only a deadline, we have to set the right bound to the latest deadline of the dependent tasks. They won't be set to later, as we are moving the deadline backward.

Finally, in the case of setting a deadline backwards, we have to keep the time gap between task 1 and the dependent tasks, based on the working hours. This feature wasn't implemented.

__
opw-6080405

Forward-Port-Of: odoo/enterprise#113787