i have custom module of creating a sale order and validate delivery challan this is my code

 new_sale_order.action_confirm()

if new_sale_order.picking_ids:
    for picking in new_sale_order.picking_ids:
        print('picking', picking)
        print('picking.id', picking.id)
        if picking.state not in ('done', 'cancel'):
           # picking.action_confirm()
           # picking.action_assign()
            try:
                picking.button_validate()
                print(f'Successfully validated picking with ID {picking.id}')
            except Exception as e:
                print(f'Error validating picking with ID {picking.id}: {e}')

	​

error	​

picking stock.picking(145,)

fol.id

ERROR: operator does not exist: integer = boolean