diff --git a/install-dev/upgrade/upgrade.php b/install-dev/upgrade/upgrade.php
index 43885b0e4..a70d2f33a 100644
--- a/install-dev/upgrade/upgrade.php
+++ b/install-dev/upgrade/upgrade.php
@@ -134,7 +134,7 @@ elseif ($versionCompare === false)
 	$fail_result .= '<action result="fail" error="29" />'."\n";
 }
 
-if((defined('_PS_CACHE_ENABLED_') && _PS_CACHE_ENABLED_ ))
+if((defined('_PS_CACHE_ENABLED_') && _PS_CACHE_ENABLED_))
 {
 	$logger->logError('The cache is activated. Please deactivate it first before lauching this script.');
 	$fail_result .= '<action result="fail" error="35" />'."\n";
@@ -282,10 +282,8 @@ if (empty($fail_result))
 	}
 }
 
-
-Configuration::loadConfiguration();
-
 if (empty($fail_result))
+{
 	foreach ($sqlContentVersion as $version => $sqlContent)
 		foreach ($sqlContent as $query)
 		{
@@ -360,29 +358,31 @@ if (empty($fail_result))
 		</request>'."\n";
 			}
 		}
+	Configuration::loadConfiguration();
 
-// Settings updated, compile and cache directories must be emptied
-$tools_dir = rtrim(_PS_INSTALL_PATH_, '\\/').DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'tools'.DIRECTORY_SEPARATOR;
-$arrayToClean = array(
-	$tools_dir.'smarty'.DIRECTORY_SEPARATOR.'cache',
-	$tools_dir.'smarty'.DIRECTORY_SEPARATOR.'compile',
-	$tools_dir.'smarty_v2'.DIRECTORY_SEPARATOR.'cache',
-	$tools_dir.'smarty_v2'.DIRECTORY_SEPARATOR.'compile'
-);
-foreach ($arrayToClean as $dir)
-	if (file_exists($dir))
-		foreach (scandir($dir) as $file)
-			if ($file[0] != '.' AND $file != 'index.php' AND $file != '.htaccess')
-				unlink($dir.DIRECTORY_SEPARATOR.$file);
 
-// delete cache filesystem if activated
-$depth = Configuration::get('PS_CACHEFS_DIRECTORY_DEPTH');
-if (defined('_PS_CACHE_ENABLED_') && _PS_CACHE_ENABLED_  && $depth)
-{
-	CacheFs::deleteCacheDirectory();
-	CacheFs::createCacheDirectories((int)$depth);
+	// Settings updated, compile and cache directories must be emptied
+	$tools_dir = rtrim(_PS_INSTALL_PATH_, '\\/').DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'tools'.DIRECTORY_SEPARATOR;
+	$arrayToClean = array(
+		$tools_dir.'smarty'.DIRECTORY_SEPARATOR.'cache',
+		$tools_dir.'smarty'.DIRECTORY_SEPARATOR.'compile',
+		$tools_dir.'smarty_v2'.DIRECTORY_SEPARATOR.'cache',
+		$tools_dir.'smarty_v2'.DIRECTORY_SEPARATOR.'compile'
+	);
+	foreach ($arrayToClean as $dir)
+		if (file_exists($dir))
+			foreach (scandir($dir) as $file)
+				if ($file[0] != '.' AND $file != 'index.php' AND $file != '.htaccess')
+					unlink($dir.DIRECTORY_SEPARATOR.$file);
+
+	// delete cache filesystem if activated
+	$depth = Configuration::get('PS_CACHEFS_DIRECTORY_DEPTH');
+	if (defined('_PS_CACHE_ENABLED_') && _PS_CACHE_ENABLED_  && $depth)
+	{
+		CacheFs::deleteCacheDirectory();
+		CacheFs::createCacheDirectories((int)$depth);
+	}
 }
-
 $result = '<?xml version="1.0" encoding="UTF-8"?>';
 if (empty($fail_result))
 {
@@ -443,5 +443,4 @@ else
 				break;
 		}
 	}
-}
-
+}
\ No newline at end of file