diff --git a/src/etc/inc/config.inc b/src/etc/inc/config.inc
index c0b8adce5..83d5c08a8 100644
--- a/src/etc/inc/config.inc
+++ b/src/etc/inc/config.inc
@@ -153,12 +153,6 @@ function write_config($desc = '', $backup = true)
         }
     }
 
-    if (!isset($config['version'])) {
-        // Examine config.xml, if for some strange reason the content is unexpected : exit directly.
-        log_error('WARNING: Corrupt config!');
-        return -1;
-    }
-
     plugins_interfaces();
 
     $cnf = OPNsense\Core\Config::getInstance();
diff --git a/src/etc/inc/xmlrpc/legacy.inc b/src/etc/inc/xmlrpc/legacy.inc
index a9c4f0df5..451115728 100644
--- a/src/etc/inc/xmlrpc/legacy.inc
+++ b/src/etc/inc/xmlrpc/legacy.inc
@@ -105,13 +105,10 @@ function merge_config_attributes(&$cnf_source, &$cnf_dest)
  */
 function firmware_version_xmlrpc()
 {
-    global $config;
-
     return array(
       'firmware' => array('version' => file_get_contents('/usr/local/opnsense/version/opnsense')),
       'kernel' => array('version' => file_get_contents('/usr/local/opnsense/version/kernel')),
       'base' => array('version' => file_get_contents('/usr/local/opnsense/version/base')),
-      'config_version' => $config['version'],
     );
 }
 
diff --git a/src/etc/rc.filter_synchronize b/src/etc/rc.filter_synchronize
index 83134fd34..bdb9fdf12 100755
--- a/src/etc/rc.filter_synchronize
+++ b/src/etc/rc.filter_synchronize
@@ -77,8 +77,6 @@ function get_vip_config_section()
  */
 function carp_check_version($url, $username, $password, $method = 'opnsense.firmware_version')
 {
-    global $config;
-
     $client = new SimpleXMLRPC_Client($url,240);
     $client->setCredentials($username, $password);
     if ($client->query($method)) {
@@ -100,14 +98,7 @@ function carp_check_version($url, $username, $password, $method = 'opnsense.firm
         return false;
     }
 
-    if (!isset($remote_version['config_version']) ||
-        $remote_version['config_version'] < $config['version']) {
-        update_filter_reload_status("The other member is on older configuration version. Sync will not be done to prevent problems!");
-        log_error("The other member is on older configuration version. Sync will not be done to prevent problems!");
-        return false;
-    } else {
-        return true;
-    }
+    return true;
 }
 
 /**
diff --git a/src/www/diag_confbak.php b/src/www/diag_confbak.php
index 20d5267f0..2058d6110 100644
--- a/src/www/diag_confbak.php
+++ b/src/www/diag_confbak.php
@@ -284,7 +284,6 @@ $( document ).ready(function() {
                   <tr>
                     <th colspan="2"><?=gettext("Diff");?></th>
                     <th><?=gettext("Date");?></th>
-                    <th><?=gettext("Version");?></th>
                     <th><?=gettext("Size");?></th>
                     <th><?=gettext("Configuration Change");?></th>
                     <th>&nbsp;</th>
@@ -297,7 +296,6 @@ $( document ).ready(function() {
                       <input type="radio" name="newtime" value="current" <?= !isset($newcheck) || $newcheck == 'current' ? 'checked="checked"' : '' ?>/>
                     </td>
                     <td> <?=date(gettext("n/j/y H:i:s"), $config['revision']['time']) ?></td>
-                    <td> <?=$config['version'] ?></td>
                     <td> <?=format_bytes(filesize("/conf/config.xml")) ?></td>
                     <td> <?="{$config['revision']['username']}: {$config['revision']['description']}" ?></td>
                     <td><b><?=gettext("Current");?></b></td>
@@ -315,10 +313,9 @@ $( document ).ready(function() {
                       <input type="radio" name="newtime" value="<?=$version['time'];?>" <?= isset($newcheck) && $newcheck == $version['time'] ? 'checked="checked"' : ''?>/>
                       <?php endif ?>
                     </td>
-                    <td> <?= date(gettext("n/j/y H:i:s"), $version['time']) ?></td>
-                    <td> <?= $version['version'] ?></td>
-                    <td> <?= format_bytes($version['filesize']) ?></td>
-                    <td> <?= "{$version['username']}: {$version['description']}" ?></td>
+                    <td><?= date(gettext("n/j/y H:i:s"), $version['time']) ?></td>
+                    <td><?= format_bytes($version['filesize']) ?></td>
+                    <td><?= "{$version['username']}: {$version['description']}" ?></td>
                     <td>
                       <a data-id="<?=$version['time'];?>" href="#" class="act_revert btn btn-default btn-xs" data-toggle="tooltip" title="<?=gettext("Revert to this configuration");?>">
                          <span class="glyphicon glyphicon-log-in"></span>