diff --git a/.config/reverse-proxy.config.php b/.config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/.config/reverse-proxy.config.php
+++ b/.config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/16.0/apache/config/reverse-proxy.config.php b/16.0/apache/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/16.0/apache/config/reverse-proxy.config.php
+++ b/16.0/apache/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/16.0/fpm-alpine/config/reverse-proxy.config.php b/16.0/fpm-alpine/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/16.0/fpm-alpine/config/reverse-proxy.config.php
+++ b/16.0/fpm-alpine/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/16.0/fpm/config/reverse-proxy.config.php b/16.0/fpm/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/16.0/fpm/config/reverse-proxy.config.php
+++ b/16.0/fpm/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/17.0/apache/config/reverse-proxy.config.php b/17.0/apache/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/17.0/apache/config/reverse-proxy.config.php
+++ b/17.0/apache/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/17.0/fpm-alpine/config/reverse-proxy.config.php b/17.0/fpm-alpine/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/17.0/fpm-alpine/config/reverse-proxy.config.php
+++ b/17.0/fpm-alpine/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/17.0/fpm/config/reverse-proxy.config.php b/17.0/fpm/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/17.0/fpm/config/reverse-proxy.config.php
+++ b/17.0/fpm/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/18.0/apache/config/reverse-proxy.config.php b/18.0/apache/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/18.0/apache/config/reverse-proxy.config.php
+++ b/18.0/apache/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/18.0/fpm-alpine/config/reverse-proxy.config.php b/18.0/fpm-alpine/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/18.0/fpm-alpine/config/reverse-proxy.config.php
+++ b/18.0/fpm-alpine/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/18.0/fpm/config/reverse-proxy.config.php b/18.0/fpm/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/18.0/fpm/config/reverse-proxy.config.php
+++ b/18.0/fpm/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/19.0-beta/apache/config/reverse-proxy.config.php b/19.0-beta/apache/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/19.0-beta/apache/config/reverse-proxy.config.php
+++ b/19.0-beta/apache/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/19.0-beta/fpm-alpine/config/reverse-proxy.config.php b/19.0-beta/fpm-alpine/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/19.0-beta/fpm-alpine/config/reverse-proxy.config.php
+++ b/19.0-beta/fpm-alpine/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/19.0-beta/fpm/config/reverse-proxy.config.php b/19.0-beta/fpm/config/reverse-proxy.config.php
index 74046c17..667be312 100644
--- a/19.0-beta/fpm/config/reverse-proxy.config.php
+++ b/19.0-beta/fpm/config/reverse-proxy.config.php
@@ -2,34 +2,24 @@
 $overwriteHost = getenv('OVERWRITEHOST');
 if ($overwriteHost) {
   $CONFIG['overwritehost'] = $overwriteHost;
-} else {
-  $CONFIG['overwritehost'] = null;
 }
 
 $overwriteProtocol = getenv('OVERWRITEPROTOCOL');
 if ($overwriteProtocol) {
   $CONFIG['overwriteprotocol'] = $overwriteProtocol;
-} else {
-  $CONFIG['overwriteprotocol'] = null;
 }
 
 $overwriteWebRoot = getenv('OVERWRITEWEBROOT');
 if ($overwriteWebRoot) {
   $CONFIG['overwritewebroot'] = $overwriteWebRoot;
-} else {
-  $CONFIG['overwritewebroot'] = null;
 }
 
 $overwriteCondAddr = getenv('OVERWRITECONDADDR');
 if ($overwriteCondAddr) {
   $CONFIG['overwritecondaddr'] = $overwriteCondAddr;
-} else {
-  $CONFIG['overwritecondaddr'] = null;
 }
 
 $trustedProxies = getenv('TRUSTED_PROXIES');
 if ($trustedProxies) {
   $CONFIG['trusted_proxies'] = array_filter(array_map('trim', explode(' ', $trustedProxies)));
-} else {
-  $CONFIG['trusted_proxies'] = null;
 }
diff --git a/README.md b/README.md
index 2b456187..431072aa 100644
--- a/README.md
+++ b/README.md
@@ -176,6 +176,8 @@ If the `TRUSTED_PROXIES` approach does not work for you, try using fixed values
 
 Check the [Nexcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/reverse_proxy_configuration.html) for more details.
 
+Keep in mind that once set, removing these environment variables won't remove these values from the configuration file, due to how Nextcloud merges configuration files together.
+
 # Running this image with docker-compose
 The easiest way to get a fully featured and functional setup is using a `docker-compose` file. There are too many different possibilities to setup your system, so here are only some examples of what you have to look for.