diff --git a/addons/website/i18n/website.pot b/addons/website/i18n/website.pot
index 1627ec64650..322cdc82ca9 100644
--- a/addons/website/i18n/website.pot
+++ b/addons/website/i18n/website.pot
@@ -8678,6 +8678,12 @@ msgstr ""
 msgid "valuation, rank"
 msgstr ""
 
+#. module: website
+#: code:addons/website/models/website.py:162
+#, python-format
+msgid "You must keep at least one website."
+msgstr ""
+
 #. module: website
 #: model:ir.model.fields,field_description:website.field_res_config_settings__website_id
 msgid "website"
diff --git a/addons/website/models/website.py b/addons/website/models/website.py
index 864aeb19571..44e782e9ac5 100644
--- a/addons/website/models/website.py
+++ b/addons/website/models/website.py
@@ -16,6 +16,7 @@ from odoo import api, fields, models, tools
 from odoo.addons.http_routing.models.ir_http import slugify, _guess_mimetype, url_for
 from odoo.addons.website.models.ir_http import sitemap_qs2dom
 from odoo.addons.portal.controllers.portal import pager
+from odoo.exceptions import UserError
 from odoo.http import request
 from odoo.modules.module import get_resource_path
 from odoo.osv.expression import FALSE_DOMAIN
@@ -221,6 +222,9 @@ class Website(models.Model):
             vals['favicon'] = tools.image_process(vals['favicon'], size=(256, 256), crop='center', output_format='ICO')
 
     def unlink(self):
+        website = self.search([('id', 'not in', self.ids)], limit=1)
+        if not website:
+            raise UserError(_('You must keep at least one website.'))
         # Do not delete invoices, delete what's strictly necessary
         attachments_to_unlink = self.env['ir.attachment'].search([
             ('website_id', 'in', self.ids),