hi, i'm trying to inherith res.users. i added tatto_artist_hours_ids and it work, but when i tried to add hour_cost and last_name field. i got error

res_user.py

from odoo import fields, models

class Users(models.Model):
    _inherit = 'res.users'

    tattoo_artist_hours_ids = fields.One2many("tattoo.artist.hours", "tattoo_artist_id", string="Orari di lavoro")
    hour_cost = fields.Float(string="Costo orario")
    last_name = fields.Char(string="Last Name")

res_user.xml

    
        
            res.users.view.form.inherit.artist
            res.users