I'm trying to add a field in an existing module view , but it doesn't recognize my field , can someone help me , here is everything you would need

here is the error : " Field "Role" does not exist in model "hr.employee"

here is the view code : 

1.  
               benevole_field
               hr.employee
               
               
                   
                       
                   
               
           
               
               
                   
                       
                   
   and here is the model : "from odoo import models, fields, api
   
   
   class reseau_de_proche_benevole(models.Model):
   _inherit = 'hr.employee'
   _name = "reseau_de_proche_benevole"
   Role = fields.Selection([
   ('benevole', 'benevole'),
   ('employee', 'employee'),
   ]) "