Hello,
I encounter a problem in chapter 8 of the Odoo 14 tutorial,
 after having followed the instructions to create the one2many model
 as well as the associate view I have this error which is displayed when I click to add a field
        

Traceback (most recent call last):
  File "C:\Isagold\isagold\odoo\addons\base\models\ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "C:\Isagold\isagold\odoo\http.py", line 684, in dispatch
    result = self._call_function(**self.params)
  File "C:\Isagold\isagold\odoo\http.py", line 360, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "C:\Isagold\isagold\odoo\service\model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "C:\Isagold\isagold\odoo\http.py", line 348, in checked_call
    result = self.endpoint(*a, **kw)
  File "C:\Isagold\isagold\odoo\http.py", line 913, in __call__
    return self.method(*args, **kw)
  File "C:\Isagold\isagold\odoo\http.py", line 532, in response_wrap
    response = f(*args, **kw)
  File "c:\isagold\isagold\addons\web\controllers\main.py", line 1394, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "c:\isagold\isagold\addons\web\controllers\main.py", line 1386, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "C:\Isagold\isagold\odoo\api.py", line 399, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "C:\Isagold\isagold\odoo\api.py", line 386, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "C:\Isagold\isagold\odoo\models.py", line 6227, in onchange
    record._update_cache(changed_values, validate=False)
  File "C:\Isagold\isagold\odoo\models.py", line 5169, in _update_cache
    cache.set(self, field, field.convert_to_cache(value, self, validate))
  File "C:\Isagold\isagold\odoo\fields.py", line 2658, in convert_to_cache
    id_ = comodel.new(value, origin=origin).id
  File "C:\Isagold\isagold\odoo\models.py", line 5523, in new
    record._update_cache(values, validate=False)
  File "C:\Isagold\isagold\odoo\models.py", line 5165, in _update_cache
    raise ValueError("Invalid field %r on model %r" % (e.args[0], self._name))
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Isagold\isagold\odoo\http.py", line 640, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "C:\Isagold\isagold\odoo\http.py", line 316, in _handle_exception
    raise exception.with_traceback(None) from new_cause
ValueError: Invalid field 'tag_ids' on model 'res.partner'

I don't understand because there is no link between res.partner and tag_ids.
If anyone knows where the problem comes from that would help me a lot to understand.
Thank you in advance and sorry if my English leaves much to be desired.