diff --git a/modules/document/document.controller.php b/modules/document/document.controller.php
index 9f86b1e1a..ccabc8f56 100644
--- a/modules/document/document.controller.php
+++ b/modules/document/document.controller.php
@@ -707,10 +707,41 @@ class documentController extends document {
 		if(!$module_srl) return new Object(-1,'msg_invalid_request');
 		$obj->module_srl = $module_srl;
 		if(!is_null($var_idx)) $obj->var_idx = $var_idx;
-		$output = executeQuery('document.deleteDocumentExtraKeys', $obj);
-		if(!$output->toBool()) return $output;
 
-		return executeQuery('document.deleteDocumentExtraVars', $obj);
+		$oDB = DB::getInstance();
+		$oDB->begin();
+
+		$output = $oDB->executeQuery('document.deleteDocumentExtraKeys', $obj);
+		if(!$output->toBool())
+		{
+			$oDB->rollback();
+			return $output;
+		}
+
+		$output = $oDB->executeQuery('document.updateDocumentExtraKeyIdxOrder', $obj);
+		if(!$output->toBool())
+		{
+			$oDB->rollback();
+			return $output;
+		}
+
+		$output =  executeQuery('document.deleteDocumentExtraVars', $obj);
+		if(!$output->toBool())
+		{
+			$oDB->rollback();
+			return $output;
+		}
+
+		$output = $oDB->executeQuery('document.updateDocumentExtraVarIdxOrder', $obj);
+		if(!$output->toBool())
+		{
+			$oDB->rollback();
+			return $output;
+		}
+
+		$oDB->commit();
+
+		return new Object();
 	}
 
 	/**
diff --git a/modules/document/document.model.php b/modules/document/document.model.php
index 1a7128fab..3dc3840a9 100644
--- a/modules/document/document.model.php
+++ b/modules/document/document.model.php
@@ -417,6 +417,51 @@
                 $obj->sort_index = 'var_idx';
                 $obj->order = 'asc';
                 $output = executeQueryArray('document.getDocumentExtraKeys', $obj);
+				
+				// correcting index order
+				$isFixed = FALSE;
+				if(is_array($output->data))
+				{
+					$prevIdx = 0;
+					foreach($output->data as $no => $value)
+					{
+						// case first
+						if($prevIdx == 0 && $value->idx != 1)
+						{
+							$args = new stdClass();
+							$args->module_srl = $module_srl;
+							$args->var_idx = $value->idx;
+							$args->new_idx = 1;
+							executeQuery('document.updateDocumentExtraKeyIdx', $args);
+							executeQuery('document.updateDocumentExtraVarIdx', $args);
+							$prevIdx = 1;
+							$isFixed = TRUE;
+							continue;
+						}
+
+						// case others
+						if($prevIdx > 0 && $prevIdx + 1 != $value->idx)
+						{
+							$args = new stdClass();
+							$args->module_srl = $module_srl;
+							$args->var_idx = $value->idx;
+							$args->new_idx = $prevIdx + 1;
+							executeQuery('document.updateDocumentExtraKeyIdx', $args);
+							executeQuery('document.updateDocumentExtraVarIdx', $args);
+							$prevIdx += 1;
+							$isFixed = TRUE;
+							continue;
+						}
+
+						$prevIdx = $value->idx;
+					}
+				}
+
+				if($isFixed)
+				{
+					$output = executeQueryArray('document.getDocumentExtraKeys', $obj);
+				}
+
                 $oExtraVar->setExtraVarKeys($output->data);
                 $keys = $oExtraVar->getExtraVars();
                 if(!$keys) $keys = array();
diff --git a/modules/document/queries/updateDocumentExtraKeyIdxOrder.xml b/modules/document/queries/updateDocumentExtraKeyIdxOrder.xml
new file mode 100644
index 000000000..101e55eaa
--- /dev/null
+++ b/modules/document/queries/updateDocumentExtraKeyIdxOrder.xml
@@ -0,0 +1,12 @@
+<query id="updateDocumentExtraKeyIdxOrder" action="update">
+	<tables>
+		<table name="document_extra_keys" />
+	</tables>
+	<columns>
+		<column name="var_idx" default="minus(1)" />
+	</columns>
+	<conditions>
+		<condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
+		<condition operation="excess" column="var_idx" var="var_idx" filter="number" notnull="notnull" pipe="and" />
+	</conditions>
+</query>
diff --git a/modules/document/queries/updateDocumentExtraVarIdxOrder.xml b/modules/document/queries/updateDocumentExtraVarIdxOrder.xml
new file mode 100644
index 000000000..83887df85
--- /dev/null
+++ b/modules/document/queries/updateDocumentExtraVarIdxOrder.xml
@@ -0,0 +1,12 @@
+<query id="updateDocumentExtraVarIdxOrder" action="update">
+	<tables>
+		<table name="document_extra_vars" />
+	</tables>
+	<columns>
+		<column name="var_idx" default="minus(1)" />
+	</columns>
+	<conditions>
+		<condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
+		<condition operation="excess" column="var_idx" var="var_idx" filter="number" notnull="notnull" pipe="and" />
+	</conditions>
+</query>