Internal Server Error: /accounts/facebook/login/callback/
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/exception.py", line 42, in inner
    response = get_response(request)
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/providers/oauth2/views.py", line 73, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/providers/oauth2/views.py", line 143, in dispatch
    return complete_social_login(request, login)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/helpers.py", line 149, in complete_social_login
    return _complete_social_login(request, sociallogin)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/helpers.py", line 165, in _complete_social_login
    ret = _process_signup(request, sociallogin)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/helpers.py", line 50, in _process_signup
    get_adapter(request).save_user(request, sociallogin, form=None)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/adapter.py", line 81, in save_user
    sociallogin.save(request)
  File "/usr/local/lib/python2.7/dist-packages/allauth/socialaccount/models.py", line 238, in save
    user.save()
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/base_user.py", line 80, in save
    super(AbstractBaseUser, self).save(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 796, in save
    force_update=force_update, update_fields=update_fields)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 824, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 908, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 947, in _do_insert
    using=using, raw=raw)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 1045, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 1054, in execute_sql
    cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/cacheops/transaction.py", line 86, in execute
    result = self._no_monkey.execute(self, sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 115, in execute
    six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 110, in execute
    return self.cursor.execute(query, args)
  File "/usr/local/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 205, in execute
    self.errorhandler(self, exc, value)
  File "/usr/local/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
IntegrityError: (1048, "Column 'contact_id' cannot be null")
"GET /accounts/facebook/login/callback/?code=