diff --git a/admin_interface/context_processor.py b/admin_interface/context_processor.py
index ba772d4..cf832cb 100644
--- a/admin_interface/context_processor.py
+++ b/admin_interface/context_processor.py
@@ -10,8 +10,8 @@ def get_active_theme(request):
         obj = objs_manager.first()
         if obj:
             obj.set_active()
-        else:
-            obj = objs_manager.create()
+        # else:
+        #     obj = objs_manager.create()
 
     elif objs_active_count == 1:
         obj = objs_active_ls[0]
diff --git a/admin_interface/import_tema/__init__.py b/admin_interface/import_tema/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/admin_interface/import_tema/admin.py b/admin_interface/import_tema/admin.py
new file mode 100644
index 0000000..1813918
--- /dev/null
+++ b/admin_interface/import_tema/admin.py
@@ -0,0 +1,156 @@
+import json
+import os
+import tempfile
+import zipfile
+
+import django
+from django import forms
+from django.conf import settings
+from django.contrib import admin, messages
+from django.contrib.auth import get_permission_codename
+from django.core.exceptions import PermissionDenied
+from django.core.files.storage import default_storage
+from django.http import HttpResponseRedirect
+from django.template.response import TemplateResponse
+from django.urls import path, reverse
+from django.utils.translation import gettext_lazy as _
+
+from .. import models
+from .forms import ImportForm
+
+
+class ImportMixin(admin.ModelAdmin):
+    """
+    Import mixin.
+
+    This is intended to be mixed with django.contrib.admin.ModelAdmin
+    https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#modeladmin-objects
+    """
+
+    #: template for change_list view
+    change_list_template = 'admin/import_export/change_list_import.html'
+    #: template for import view
+    import_template_name = 'admin/import_export/import.html'
+
+    def get_model_info(self):
+        app_label = self.model._meta.app_label
+        return (self.model._meta.app_label, self.model._meta.model_name)
+
+    def has_import_permission(self, request):
+        """
+        Returns whether a request has import permission.
+        """
+        IMPORT_PERMISSION_CODE = getattr(settings, 'IMPORT_EXPORT_IMPORT_PERMISSION_CODE', None)
+        if IMPORT_PERMISSION_CODE is None:
+            return True
+
+        opts = self.opts
+        codename = get_permission_codename(IMPORT_PERMISSION_CODE, opts)
+        return request.user.has_perm("%s.%s" % (opts.app_label, codename))
+
+    def get_urls(self):
+        urls = super().get_urls()
+        info = self.get_model_info()
+        my_urls = [
+            path('import/',
+                self.admin_site.admin_view(self.import_action),
+                name='%s_%s_import' % info),
+        ]
+        return my_urls + urls
+
+    def get_import_context_data(self, **kwargs):
+        return self.get_context_data(**kwargs)
+
+    def get_context_data(self, **kwargs):
+        return {}
+
+    def get_form_kwargs(self, form, *args, **kwargs):
+        """
+        Prepare/returns kwargs for the import form.
+
+        To distinguish between import and confirm import forms,
+        the following approach may be used:
+
+            if isinstance(form, ImportForm):
+                # your code here for the import form kwargs
+                # e.g. update.kwargs({...})
+            elif isinstance(form, ConfirmImportForm):
+                # your code here for the confirm import form kwargs
+                # e.g. update.kwargs({...})
+            ...
+        """
+        return kwargs
+
+    def import_action(self, request, *args, **kwargs):
+        """
+        Perform a dry_run of the import to make sure the import will not
+        result in errors.  If there where no error, save the user
+        uploaded file to a local temp file that will be used by
+        'process_import' for the actual import.
+        """
+        if not self.has_import_permission(request):
+            raise PermissionDenied
+
+        context = self.get_import_context_data()
+
+        form_type = ImportForm
+        form_kwargs = self.get_form_kwargs(form_type, *args, **kwargs)
+        form = form_type(request.POST or None,
+                         request.FILES or None,
+                         **form_kwargs)
+
+        if request.POST and form.is_valid():
+            import_file_tema = form.cleaned_data['tema']
+            if zipfile.is_zipfile(import_file_tema):
+                with zipfile.ZipFile(import_file_tema, 'r') as zip_ref:
+                    with tempfile.TemporaryDirectory() as tempdir:
+                        zip_ref.extractall(tempdir)
+                        lst = os.listdir(tempdir)
+                        allowed_extensions=[".gif", ".jpg", ".jpeg", ".png", ".svg"]
+                        try:
+                            tema_json = [s for s in os.listdir(f'{tempdir}/{lst[0]}') if '.json' in s][0]
+                            logo = [s for s in os.listdir(f'{tempdir}/{lst[0]}/logo') if any(ele in s for ele in allowed_extensions)][0]
+                            favicon = [s for s in os.listdir(f'{tempdir}/{lst[0]}/favicon') if any(ele in s for ele in allowed_extensions)][0]
+                            with open(f'{tempdir}/{lst[0]}/{tema_json}', 'r') as temporary_file:
+                                result = json.loads(temporary_file.read())
+                            with open(f'{tempdir}/{lst[0]}/logo/{logo}', 'rb') as temporary_file:
+                                default_storage.save(f"admin-interface/logo/{temporary_file.name.split('/')[-1]}", temporary_file)
+                            with open(f'{tempdir}/{lst[0]}/favicon/{favicon}', 'rb') as temporary_file:
+                                default_storage.save(f"admin-interface/favicon/{temporary_file.name.split('/')[-1]}", temporary_file)
+                            skip_result = False
+                        except FileNotFoundError as e:
+                            messages.error(request, 'Struttura del file .zip errata.')
+                            skip_result = True
+                if not skip_result:
+                    try:
+                        new_theme = models.Theme(
+                            **result[0]['fields']
+                        )
+                        new_theme.save()
+                        
+                        messages.success(request, _('Import finished'))
+                    except:
+                        messages.error(request, 'Struttura del file .json errata.')
+            else:
+                messages.error(request, 'È richiesto un file .zip')
+            
+            url = reverse('admin:%s_%s_changelist' % self.get_model_info(),
+                        current_app=self.admin_site.name)
+            return HttpResponseRedirect(url)
+        else:
+            context.update(self.admin_site.each_context(request))
+
+            context['title'] = _("Import")
+            context['form'] = form
+            context['opts'] = self.model._meta
+
+            request.current_app = self.admin_site.name
+            return TemplateResponse(request, [self.import_template_name],
+                                    context)
+
+    def changelist_view(self, request, extra_context=None):
+        if extra_context is None:
+            extra_context = {}
+        extra_context['has_import_permission'] = self.has_import_permission(request)
+        return super().changelist_view(request, extra_context)
+
diff --git a/admin_interface/import_tema/forms.py b/admin_interface/import_tema/forms.py
new file mode 100644
index 0000000..1d80c47
--- /dev/null
+++ b/admin_interface/import_tema/forms.py
@@ -0,0 +1,11 @@
+import os.path
+
+from django import forms
+from django.contrib.admin.helpers import ActionForm
+from django.utils.translation import gettext_lazy as _
+
+
+class ImportForm(forms.Form):
+    tema = forms.FileField(
+        label='Zip'
+        )
diff --git a/admin_interface/import_tema/locale/it/LC_MESSAGES/django.mo b/admin_interface/import_tema/locale/it/LC_MESSAGES/django.mo
new file mode 100644
index 0000000..722f52c
Binary files /dev/null and b/admin_interface/import_tema/locale/it/LC_MESSAGES/django.mo differ
diff --git a/admin_interface/import_tema/locale/it/LC_MESSAGES/django.po b/admin_interface/import_tema/locale/it/LC_MESSAGES/django.po
new file mode 100644
index 0000000..e60c55f
--- /dev/null
+++ b/admin_interface/import_tema/locale/it/LC_MESSAGES/django.po
@@ -0,0 +1,139 @@
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+#
+# Christian Galeffi <chri@gallochri.com>, 2015.
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-06-04 09:27+0200\n"
+"PO-Revision-Date: 2015-08-30 20:32+0100\n"
+"Last-Translator: Christian Galeffi <chri@gallochri.com>\n"
+"Language-Team: Italian <kde-i18n-it@kde.org>\n"
+"Language: it\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Poedit 1.5.4\n"
+
+#: admin.py:194
+#, python-format
+msgid "%s through import_export"
+msgstr ""
+
+#: admin.py:200
+msgid "Import finished, with {} new and {} updated {}."
+msgstr ""
+
+#: admin.py:298
+#, python-format
+msgid "<h1>Imported file has a wrong encoding: %s</h1>"
+msgstr ""
+
+#: admin.py:300
+#, python-format
+msgid "<h1>%s encountered while trying to read file: %s</h1>"
+msgstr ""
+
+#: admin.py:331 templates/admin/import_export/change_list_import_item.html:5
+#: templates/admin/import_export/import.html:10
+msgid "Import"
+msgstr "Importare"
+
+#: admin.py:496 templates/admin/import_export/change_list_export_item.html:5
+#: templates/admin/import_export/export.html:7
+msgid "Export"
+msgstr "Esportare"
+
+#: admin.py:554
+msgid "You must select an export format."
+msgstr "Devi selezionare un formato di esportazione."
+
+#: admin.py:567
+#, python-format
+msgid "Export selected %(verbose_name_plural)s"
+msgstr "Esporta selezionati %(verbose_name_plural)s"
+
+#: forms.py:10
+msgid "File to import"
+msgstr "File da importare"
+
+#: forms.py:13 forms.py:41 forms.py:66
+msgid "Format"
+msgstr "Formato"
+
+#: templates/admin/import_export/base.html:11
+msgid "Home"
+msgstr "Home"
+
+#: templates/admin/import_export/export.html:31
+#: templates/admin/import_export/import.html:52
+msgid "Submit"
+msgstr "Inviare"
+
+#: templates/admin/import_export/import.html:20
+msgid ""
+"Below is a preview of data to be imported. If you are satisfied with the "
+"results, click 'Confirm import'"
+msgstr ""
+"Questa è un'anteprima dei dati che saranno importati. Se il risultato è "
+"soddisfacente, premi 'Conferma importazione'"
+
+#: templates/admin/import_export/import.html:23
+msgid "Confirm import"
+msgstr "Conferma importazione"
+
+#: templates/admin/import_export/import.html:31
+msgid "This importer will import the following fields: "
+msgstr "Verranno importati i seguenti campi:"
+
+#: templates/admin/import_export/import.html:61
+#: templates/admin/import_export/import.html:90
+msgid "Errors"
+msgstr "Errori"
+
+#: templates/admin/import_export/import.html:72
+msgid "Line number"
+msgstr "Numero linea"
+
+#: templates/admin/import_export/import.html:82
+msgid "Some rows failed to validate"
+msgstr ""
+
+#: templates/admin/import_export/import.html:84
+msgid ""
+"Please correct these errors in your data where possible, then reupload it "
+"using the form above."
+msgstr ""
+
+#: templates/admin/import_export/import.html:89
+msgid "Row"
+msgstr ""
+
+#: templates/admin/import_export/import.html:116
+msgid "Non field specific"
+msgstr ""
+
+#: templates/admin/import_export/import.html:137
+msgid "Preview"
+msgstr "Anteprima"
+
+#: templates/admin/import_export/import.html:152
+msgid "New"
+msgstr "Nuovo"
+
+#: templates/admin/import_export/import.html:154
+msgid "Skipped"
+msgstr "Salta"
+
+#: templates/admin/import_export/import.html:156
+msgid "Delete"
+msgstr "Cancella"
+
+#: templates/admin/import_export/import.html:158
+msgid "Update"
+msgstr "Aggiorna"
+
+#~ msgid "Import finished"
+#~ msgstr "Importazione terminata"
diff --git a/admin_interface/import_tema/static/import_export/import.css b/admin_interface/import_tema/static/import_export/import.css
new file mode 100644
index 0000000..bb20ba2
--- /dev/null
+++ b/admin_interface/import_tema/static/import_export/import.css
@@ -0,0 +1,81 @@
+.import-preview .errors {
+  position: relative;
+}
+
+.validation-error-count {
+  display: inline-block;
+  background-color: #e40000;
+  border-radius: 6px;
+  color: white;
+  font-size: 0.9em;
+  position: relative;
+  font-weight: bold;
+  margin-top: -2px;
+  padding: 0.2em 0.4em;
+}
+
+.validation-error-container {
+  position: absolute;
+  opacity: 0;
+  pointer-events: none;
+  background-color: #ffc1c1;
+  padding: 14px 15px 10px;
+  top: 25px;
+  margin: 0 0 20px 0;
+  width: 200px;
+  z-index: 2;
+}
+
+table.import-preview tr.skip {
+  background-color: #d2d2d2;
+}
+
+table.import-preview tr.new {
+  background-color: #bdd8b2;
+}
+
+table.import-preview tr.delete {
+  background-color: #f9bebf;
+}
+
+table.import-preview tr.update {
+  background-color: #fdfdcf;
+}
+
+.import-preview td:hover .validation-error-count {
+  z-index: 3;
+}
+.import-preview td:hover .validation-error-container {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+.validation-error-list {
+  margin: 0;
+  padding: 0;
+}
+
+.validation-error-list li {
+  list-style: none;
+  margin: 0;
+}
+
+.validation-error-list > li > ul {
+  margin: 8px 0;
+  padding: 0;
+}
+
+.validation-error-list > li > ul > li {
+  padding: 0;
+  margin: 0 0 10px;
+  line-height: 1.28em;
+}
+
+.validation-error-field-label {
+  display: block;
+  border-bottom: 1px solid #e40000;
+  color: #e40000;
+  text-transform: uppercase;
+  font-weight: bold;
+  font-size: 0.85em;
+}
diff --git a/admin_interface/import_tema/templates/admin/import_export/base.html b/admin_interface/import_tema/templates/admin/import_export/base.html
new file mode 100644
index 0000000..0aadf18
--- /dev/null
+++ b/admin_interface/import_tema/templates/admin/import_export/base.html
@@ -0,0 +1,17 @@
+{% extends "admin/base_site.html" %}
+{% load i18n admin_modify %}
+{% load admin_urls %}
+{% load static %}
+
+{% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% static "admin/css/forms.css" %}" />{% endblock %}
+{% block bodyclass %}{{ block.super }} {{ opts.app_label }}-{{ opts.object_name.lower }} change-form{% endblock %}
+{% if not is_popup %}
+{% block breadcrumbs %}
+<div class="breadcrumbs">
+<a href="{% url 'admin:index' %}">{% trans 'Home' %}</a>
+&rsaquo; <a href="{% url 'admin:app_list' app_label=opts.app_label %}">{{ opts.app_config.verbose_name }}</a>
+&rsaquo; <a href="{% url opts|admin_urlname:'changelist' %}">{{ opts.verbose_name_plural|capfirst }}</a>
+&rsaquo; {% block breadcrumbs_last %}{% endblock %}
+</div>
+{% endblock %}
+{% endif %}
diff --git a/admin_interface/import_tema/templates/admin/import_export/change_list.html b/admin_interface/import_tema/templates/admin/import_export/change_list.html
new file mode 100644
index 0000000..0f23dc7
--- /dev/null
+++ b/admin_interface/import_tema/templates/admin/import_export/change_list.html
@@ -0,0 +1,13 @@
+{% extends "admin/change_list.html" %}
+
+{# Original template renders object-tools only when has_add_permission is True. #}
+{# This hack allows sub templates to add to object-tools #}
+{% block object-tools %}
+  <ul class="object-tools">
+    {% block object-tools-items %}
+      {% if has_add_permission %}
+        {{ block.super }}
+      {% endif %}
+    {% endblock %}
+  </ul>
+{% endblock %}
diff --git a/admin_interface/import_tema/templates/admin/import_export/change_list_import.html b/admin_interface/import_tema/templates/admin/import_export/change_list_import.html
new file mode 100644
index 0000000..9aa1860
--- /dev/null
+++ b/admin_interface/import_tema/templates/admin/import_export/change_list_import.html
@@ -0,0 +1,6 @@
+{% extends "admin/import_export/change_list.html" %}
+
+{% block object-tools-items %}
+  {% include "admin/import_export/change_list_import_item.html" %}
+  {{ block.super }}
+{% endblock %}
diff --git a/admin_interface/import_tema/templates/admin/import_export/import.html b/admin_interface/import_tema/templates/admin/import_export/import.html
new file mode 100644
index 0000000..f791c79
--- /dev/null
+++ b/admin_interface/import_tema/templates/admin/import_export/import.html
@@ -0,0 +1,171 @@
+{% extends "admin/import_export/base.html" %}
+{% load i18n %}
+{% load admin_urls %}
+{% load import_export_tags %}
+{% load static %}
+
+{% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% static "import_export/import.css" %}" />{% endblock %}
+
+{% block breadcrumbs_last %}
+{% trans "Import" %}
+{% endblock %}
+
+{% block content %}
+
+  {% if confirm_form %}
+    <form action="{% url opts|admin_urlname:"process_import" %}" method="POST">
+      {% csrf_token %}
+      {{ confirm_form.as_p }}
+      <p>
+        {% trans "Below is a preview of data to be imported. If you are satisfied with the results, click 'Confirm import'" %}
+      </p>
+      <div class="submit-row">
+        <input type="submit" class="default" name="confirm" value="{% trans "Confirm import" %}">
+      </div>
+    </form>
+  {% else %}
+    <form action="" method="post" enctype="multipart/form-data">
+      {% csrf_token %}
+
+      <p>
+        {% trans "This importer will import the following fields: " %}
+        <code>{{ fields|join:", " }}</code>
+      </p>
+
+      <fieldset class="module aligned">
+        {% for field in form %}
+          <div class="form-row">
+            {{ field.errors }}
+
+            {{ field.label_tag }}
+
+            {{ field }}
+
+            {% if field.field.help_text %}
+            <p class="help">{{ field.field.help_text|safe }}</p>
+            {% endif %}
+          </div>
+        {% endfor %}
+      </fieldset>
+
+      <div class="submit-row">
+        <input type="submit" class="default" value="{% trans "Submit" %}">
+      </div>
+    </form>
+  {% endif %}
+
+  {% if result %}
+
+    {% if result.has_errors %}
+
+      <h2>{% trans "Errors" %}</h2>
+      <ul>
+        {% for error in result.base_errors  %}
+        <li>
+          {{ error.error }}
+          <div class="traceback">{{ error.traceback|linebreaks }}</div>
+        </li>
+        {% endfor %}
+        {% for line, errors in result.row_errors %}
+          {% for error in errors %}
+            <li>
+              {% trans "Line number" %}: {{ line }} - {{ error.error }}
+              <div><code>{{ error.row.values|join:", " }}</code></div>
+              <div class="traceback">{{ error.traceback|linebreaks }}</div>
+            </li>
+          {% endfor %}
+        {% endfor %}
+      </ul>
+
+    {% elif result.has_validation_errors %}
+
+      <h2>{% trans "Some rows failed to validate" %}</h2>
+        
+      <p>{% trans "Please correct these errors in your data where possible, then reupload it using the form above." %}</p>
+      
+      <table class="import-preview">
+        <thead>
+          <tr>
+            <th>{% trans "Row" %}</th>
+            <th>{% trans "Errors" %}</th>
+            {% for field in result.diff_headers %}
+              <th>{{ field }}</th>
+            {% endfor %}
+          </tr>
+        </thead>
+        <tbody>
+        {% for row in result.invalid_rows %}
+          <tr>
+            <td>{{ row.number }} </td>
+            <td class="errors">
+              <span class="validation-error-count">{{ row.error_count }}</span> 
+              <div class="validation-error-container">
+                <ul class="validation-error-list">
+                  {% for field_name, error_list in row.field_specific_errors.items %}
+                    <li>
+                        <span class="validation-error-field-label">{{ field_name }}</span>
+                        <ul>
+                          {% for error in error_list %}
+                            <li>{{ error }}</li>
+                          {% endfor %}
+                        </ul>
+                    </li>
+                  {% endfor %}
+                  {% if row.non_field_specific_errors %}
+                    <li>
+                      <span class="validation-error-field-label">{% trans "Non field specific" %}</span>
+                      <ul>
+                        {% for error in row.non_field_specific_errors %}
+                          <li>{{ error }}</li>
+                        {% endfor %}
+                      </ul>
+                    </li>
+                  {% endif %}
+                </ul>
+              </div>
+            </td>
+            {% for field in row.values %}
+              <td>{{ field }}</td>
+            {% endfor %}
+          </tr>
+        {% endfor %}
+        </tbody>
+      </table>
+  
+    {% else %}
+
+      <h2>{% trans "Preview" %}</h2>
+
+      <table class="import-preview">
+        <thead>
+          <tr>
+            <th></th>
+            {% for field in result.diff_headers %}
+              <th>{{ field }}</th>
+            {% endfor %}
+          </tr>
+        </thead>
+        {% for row in result.valid_rows %}
+          <tr class="{{ row.import_type }}">
+            <td class="import-type">
+              {% if row.import_type == 'new' %}
+                {% trans "New" %}
+              {% elif row.import_type == 'skip' %}
+                {% trans "Skipped" %}
+              {% elif row.import_type == 'delete' %}
+                {% trans "Delete" %}
+              {% elif row.import_type == 'update' %}
+                {% trans "Update" %}
+              {% endif %}
+            </td>
+            {% for field in row.diff %}
+              <td>{{ field }}</td>
+            {% endfor %}
+          </tr>
+        {% endfor %}
+      </table>
+
+    {% endif %}
+
+  {% endif %}
+{% endblock %}
diff --git a/admin_interface/migrations/0029_auto_20221025_1559.py b/admin_interface/migrations/0029_auto_20221025_1559.py
new file mode 100644
index 0000000..2b0405e
--- /dev/null
+++ b/admin_interface/migrations/0029_auto_20221025_1559.py
@@ -0,0 +1,32 @@
+# Generated by Django 4.0.3 on 2022-10-25 13:59
+
+from django.conf import settings
+import django.db.models.deletion
+from django.db import connection, migrations, models, transaction
+
+
+def forward(apps, schema_editor):
+    Theme = apps.get_model("admin_interface", "Theme")
+    if len(Theme.objects.all()) == 1 and Theme.objects.first().name == 'Django':
+        with transaction.atomic():
+            cursor = connection.cursor()
+            cursor.execute("""truncate table "admin_interface_theme" restart identity;""")
+
+def reverse(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('admin_interface', '0028_alter_theme_demo'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse),
+        migrations.AlterField(
+            model_name='usertheme',
+            name='user',
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/admin_interface/models.py b/admin_interface/models.py
index 090ef13..a485104 100644
--- a/admin_interface/models.py
+++ b/admin_interface/models.py
@@ -20,8 +20,8 @@ class UserTheme(models.Model):
         verbose_name = 'Users theme'
         verbose_name_plural = 'Users themes'
 
-    user = models.ForeignKey(
-        'auth.User', on_delete=models.CASCADE, null=True, unique=True)
+    user = models.OneToOneField(
+        'auth.User', on_delete=models.CASCADE, null=True)
     theme = models.ForeignKey('Theme', on_delete=models.CASCADE)
 
 
@@ -65,8 +65,8 @@ class Theme(models.Model):
             obj = objs_manager.all().first()
             if obj:
                 obj.set_active()
-            else:
-                obj = objs_manager.create()
+            # else:
+            #     obj = objs_manager.create()
 
         elif objs_active_count == 1:
             obj = objs_active_ls[0]