diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index c33f7db4cc..69067b8d59 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -3911,7 +3911,10 @@ abstract class MetaModel
 			foreach (self::DBGetIndexes($sClass) as $aColumns)
 			{
 				$sIndexId = implode('_', $aColumns);
-
+				if (isset($aTableInfo['Indexes'][$sIndexId]) && $aTableInfo['Indexes'][$sIndexId]['used'])
+				{
+					continue;
+				}
 				if(!CMDBSource::HasIndex($sTable, $sIndexId, $aColumns))
 				{
 					$sColumns = "`".implode("`, `", $aColumns)."`";