[FIX] sale_project: batch confirmation of sales orders

The override of `_action_confirm` in sale_project will crash when orders from multiple companies
are confirmed together.
This commit adapts the method to handle multiple records correctly.

closes odoo/odoo#58269

X-original-commit: ab14083b0ddfb73da167938c43f35a992fbbe93c
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale_project/models/sale_order.py

@@ -50,8 +50,13 @@ class SaleOrder(models.Model):
     def _action_confirm(self):
         """ On SO confirmation, some lines should generate a task or a project. """
         result = super()._action_confirm()
-        self.mapped('order_line').sudo() \
-            .with_company(self.company_id)._timesheet_service_generation()
+        if len(self.company_id) == 1:
+            # All orders are in the same company
+            self.order_line.sudo().with_company(self.company_id)._timesheet_service_generation()
+        else:
+            # Orders from different companies are confirmed together
+            for order in self:
+                order.order_line.sudo().with_company(order.company_id)._timesheet_service_generation()
         return result
 
     def action_view_task(self):