Hi,

I have created a new model inherit from sale.order.line like this :

class sale_order_line_option(models.Model):
    _name="sale.order.line.option"
    _inherit = "sale.order.line"
    
    accept_option = fields.Boolean(u'Option prise',readonly=True,
                                   states={'draft': [('readonly', False)],'sent': [('readonly', False)]})
    tax_id = fields.Many2many('account.tax', 'sale_order_option_tax', 'order_line_option_id', 'tax_id',readonly=True,
                               states={'draft': [('readonly', False)]})

I create this model because I want two differents table : 1 table for sale.order.line and 1 table for sale.order.line.option

And I inherit sale.order too :

class sale_order(models.Model):
    _inherit = "sale.order"
    
    order_line_option = fields.One2many('sale.order.line.option', 'order_id', 'Options',readonly=True,
                                  states={'draft': [('readonly', False)],'sent': [('readonly', False)]})

My problem it's I can't create  an order if I add a sale.order.line!
I have this error : One of the documents you are trying to access has been deleted, please try again after refreshing.

( I have no error if I just add a sale.order.line.option )

Thanks in advance for yours answers