Index: branches/5.2.x/core/units/helpers/deployment_helper.php
===================================================================
diff -u -N -r16019 -r16467
--- branches/5.2.x/core/units/helpers/deployment_helper.php	(.../deployment_helper.php)	(revision 16019)
+++ branches/5.2.x/core/units/helpers/deployment_helper.php	(.../deployment_helper.php)	(revision 16467)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: deployment_helper.php 16019 2014-03-24 16:12:10Z alex $
+* @version	$Id: deployment_helper.php 16467 2016-11-24 20:43:07Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2011 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -396,22 +396,25 @@
 			return false;
 		}
 
-		foreach ($matches as $index => $match) {
+		$revision_numbers = array();
+
+		foreach ( $matches as $index => $match ) {
 			$revision = $match[1][0];
 
-			if ( $this->revisionApplied($revision) ) {
-				// skip applied revisions
-				continue;
-			}
-
-			if ( isset($this->revisionSqls[$revision]) ) {
-				// duplicate revision among non-applied ones
+			if ( in_array($revision, $revision_numbers) ) {
 				$this->displayStatus('FAILED' . PHP_EOL . 'Duplicate revision #' . $revision . ' found');
 
 				return false;
 			}
 
-			// get revision sqls
+			$revision_numbers[] = $revision;
+
+			if ( $this->revisionApplied($revision) ) {
+				// Skip applied revisions.
+				continue;
+			}
+
+			// Get revision sqls.
 			$start_pos = $match[0][1] + strlen($match[0][0]);
 			$end_pos = isset($matches[$index + 1]) ? $matches[$index + 1][0][1] : strlen($sqls);
 			$revision_sqls = substr($sqls, $start_pos, $end_pos - $start_pos);