I created a function that does the following job: when changing the sales person field inside sale.order model under 'other info' tab, it will automatically change the sales person field inside the invoices (account.move) in the 'other info' tab also. Here is my function:

class SaleOrder(models.Model):
    _inherit = "account.move"

    @api.onchange('user_id')
    def _custom_onchange_user_id(self):
        moves = self.env['sale.order'].browse(self.invoice_ids.ids)
        moves.sudo().write({'invoice_user_id': self.user_id.id})

The first step is done, but the 2nd step is that I have about 100 invoices that have a salesperson different than the one found in the sales order and I want to change them fastly. So, I created a server action and upon selecting them all I will change the sales person field to the same one found inside the sales order. Here is the code:

    model="ir.actions.server" id="action_change_sales_person">
    name="name">Adjust Sales Person Field
    name="type">ir.actions.server
    name="model_id" ref="account.model_account_move"/>
    name="binding_model_id" ref="account.model_account_move"/>
    name="state">code
    name="binding_view_types">form,list
    name="code">
        for record in records:
            record._custom_onchange_user_id()
    
    

Now pressing on the action button I am getting an error, can anyone help me adjust this code? Thanks