diff --git a/upgrades/7.0/scripts/BeforeUpgrade.php b/upgrades/7.0/scripts/BeforeUpgrade.php
new file mode 100644
index 0000000000..09fd3e4051
--- /dev/null
+++ b/upgrades/7.0/scripts/BeforeUpgrade.php
@@ -0,0 +1,86 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+use Espo\Core\Exceptions\Error;
+
+use Espo\Core\Container;
+
+class BeforeUpgrade
+{
+    public function run(Container $container)
+    {
+        $this->container = $container;
+
+        $this->processCheckExtensions();
+    }
+
+    private function processCheckExtensions(): void
+    {
+        $errorMessageList = [];
+
+        $this->processCheckExtension('Advanced Pack', '2.8.0', $errorMessageList);
+        $this->processCheckExtension('Sales Pack', '1.1.0', $errorMessageList);
+
+        if (!count($errorMessageList)) {
+            return;
+        }
+
+        $message = implode("\n\n", $errorMessageList);
+
+        throw new Error($message);
+    }
+
+    private function processCheckExtension(string $name, string $minVersion, array &$errorMessageList): void
+    {
+        $em = $this->container->get('entityManager');
+
+        $extension = $em->getRepository('Extension')
+            ->where([
+                'name' => $name,
+                'isInstalled' => true,
+            ])
+            ->findOne();
+
+        if (!$extension) {
+            return;
+        }
+
+        $version = $extension->get('version');
+
+        if (version_compare($version, $minVersion, '>=')) {
+            return;
+        }
+
+        $message =
+            "EspoCRM 7.0 is not compatible with '{$name}' extension of a version lower than {$minVersion}. " .
+            "Please upgrade the extension or uninstall it. Then run the upgrade command again.";
+
+        $errorMessageList[] = $message;
+    }
+}