From afff0bea344d6e6ce7c19b101dcfb8093ae72d63 Mon Sep 17 00:00:00 2001
From: Sukhwinder Dhillon <sukhwinder33445@gmail.com>
Date: Tue, 12 Oct 2021 18:34:24 +0200
Subject: [PATCH] BpConfigBaseForm: Fix backend change

Do not use the previously saved backend if the value has been
changed to `Use the configured default backend` (null)
---
 application/forms/BpConfigForm.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/application/forms/BpConfigForm.php b/application/forms/BpConfigForm.php
index 7895d00..531cf0f 100644
--- a/application/forms/BpConfigForm.php
+++ b/application/forms/BpConfigForm.php
@@ -167,7 +167,7 @@ class BpConfigForm extends BpConfigBaseForm
         }
         $meta = $config->getMetadata();
         foreach ($this->getValues() as $key => $value) {
-            if ($value === null || $value === '') {
+            if ($key !== 'Backend' && ($value === null || $value === '')) {
                 continue;
             }
             if ($meta->hasKey($key)) {