500: Internal Server Error

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 808, in dispatch
    r = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 361, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 349, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 914, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 533, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/#Methodoos/affiliate_management/controllers/affiliate_website.py", line 136, in register
    if user.signup_valid and user.state == 'draft':
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 965, in __get__
    record.ensure_one()
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 5019, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
Exception

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

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 808, in dispatch
    r = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 361, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 349, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 914, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 533, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/#Methodoos/affiliate_management/controllers/affiliate_website.py", line 136, in register
    if user.signup_valid and user.state == 'draft':
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 965, in __get__
    record.ensure_one()
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 5019, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
ValueError: Expected singleton: affiliate.request(32, 42)