Hello 

I'm using Odoo 19 with Studio and need help with an automation issue. 

 **Goal:** 

Update the `date_deadline` field in all tasks when the `date_start` field  is modified in the parent project.

Problem: The code executes without errors, but the task deadlines are not updated.  Any ideas what could be wrong?  Thanks!

for task in env['project.task'].search([('project_id', '=', record.id)]):
    task.sudo().write({'date_deadline': "2026-09-01"})