In Odoo V16, to make the scheduled date empty in a transfer, you can use the following methods:

1. Manually update the scheduled date: Go to Inventory > Operations > Transfers, open the specific transfer record you want to edit, and set the “Scheduled Date” field to empty or false.

2. Customize using automated actions: You can create an automated action in Odoo that triggers when a certain condition is met or a specific action occurs. To create an automated action, go to Settings > Technical > Automated Actions, and configure your new action with appropriate triggering conditions and Python code that sets the scheduled_date field to False.

   record.scheduled_date = False
   

3. Developing a custom module: Create a custom module that inherits from stock.picking model and overrides the relevant method (e.g., action_confirm, button_validate) responsible for creating or confirming transfers. In this override method, add logic to set the scheduled_date field to False.

   from odoo import models
   
   class StockPicking(models.Model):
       _inherit = "stock.picking"
   
       def action_confirm(self):
           res = super(StockPicking, self).action_confirm()
           for picking in self:
               if picking.condition_to_unset_scheduled_date:
                   picking.scheduled_date = False
           return res
   

   Don’t forget to replace condition_to_unset_scheduled_date with your desired condition.

4. Update via API (e.g., XML-RPC):

   import xmlrpc.client
   
   url = 'https://your_odoo_instance.com'
   db = 'your_db_name'
   username = 'your_username'
   password = 'your_password'
   
   common_proxy = xmlrpc.client.ServerProxy(f'{url}/xmlrpc/2/common')
   object_proxy = xmlrpc.client.ServerProxy(f'{url}/xmlrpc/2/object')
   uid = common_proxy.authenticate(db, username, password, {})
   
   picking_id = 1 # Replace with the ID of the transfer you want to update
   
   object_proxy.execute_kw(
       db,
       uid,
       password,
       'stock.picking',
       'write',
       [[picking_id], {"scheduled_date": False}]
   )
   

Remember to test any customization on a staging or development environment before applying it to your production environment.

By using one of these methods, you can effectively set the scheduled date in a transfer record to empty (False) in Odoo V16