[ci] Fixed failures

Author: pandafy

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
           pip install -U pip wheel setuptools
           pip install -U -r requirements-test.txt
           pip install -e .[saml,openvpn_status]
-          pip install --upgrade --no-deps --no-cache-dir "https://github.com/openwisp/openwisp-users/tarball/issues/497-export-users"
+          pip install --upgrade --no-deps --no-cache-dir --force-reinstall "https://github.com/openwisp/openwisp-users/tarball/issues/497-export-users"
           pip install ${{ matrix.django-version }}
 
       - name: Start InfluxDB and Redis container

openwisp_radius/migrations/0043_registereduser_add_uuid.py

@@ -64,7 +64,6 @@ class Migration(migrations.Migration):
                         help_text=REGISTERED_USER_ORGANIZATION_HELP_TEXT,
                         null=True,
                         on_delete=django.db.models.deletion.CASCADE,
-                        related_name="registered_users",
                         to=swapper.get_model_name("openwisp_users", "Organization"),
                         verbose_name="organization",
                     ),