diff --git a/workflow/engine/classes/model/AppHistory.php b/workflow/engine/classes/model/AppHistory.php
index 23e069d00..dfd28e7a4 100755
--- a/workflow/engine/classes/model/AppHistory.php
+++ b/workflow/engine/classes/model/AppHistory.php
@@ -130,6 +130,7 @@ class AppHistory extends BaseAppHistory
 
         $c->add(AppHistoryPeer::PRO_UID, $PRO_UID);
         $c->add(AppHistoryPeer::APP_UID, $APP_UID);
+        $c->add(AppHistoryPeer::TAS_UID, $TAS_UID);
         if ((isset($DYN_UID))&&($DYN_UID!="")) {
             $c->add(AppHistoryPeer::DYN_UID, $DYN_UID);
         }
diff --git a/workflow/engine/methods/cases/ajaxListener.php b/workflow/engine/methods/cases/ajaxListener.php
index 8c7b90c2c..8270614be 100755
--- a/workflow/engine/methods/cases/ajaxListener.php
+++ b/workflow/engine/methods/cases/ajaxListener.php
@@ -851,7 +851,7 @@ class Ajax
         $_POST["DYN_UID"] = $_REQUEST["DYN_UID"];
 
         $G_PUBLISH = new Publisher();
-        $FieldsHistory = unserialize($_SESSION["HISTORY_DATA"]);
+        $FieldsHistory = $_SESSION["HISTORY_DATA"];
         $Fields["APP_DATA"] = $FieldsHistory[$_POST["HISTORY_ID"]]; //isset($FieldsHistory[$_POST["HISTORY_ID"]])? $FieldsHistory[$_POST["HISTORY_ID"]] : "";
         $Fields["APP_DATA"]["__DYNAFORM_OPTIONS"]["PREVIOUS_STEP_LABEL"] = "";
         $Fields["APP_DATA"]["__DYNAFORM_OPTIONS"]["NEXT_STEP_LABEL"] = "";
diff --git a/workflow/engine/methods/cases/casesHistoryDynaformPage_Ajax.php b/workflow/engine/methods/cases/casesHistoryDynaformPage_Ajax.php
index bdd7d0430..498b738a2 100644
--- a/workflow/engine/methods/cases/casesHistoryDynaformPage_Ajax.php
+++ b/workflow/engine/methods/cases/casesHistoryDynaformPage_Ajax.php
@@ -383,7 +383,7 @@ if ($actionAjax == 'dynaformChangeLogViewHistory') {
 
     global $G_PUBLISH;
     $G_PUBLISH = new Publisher();
-    $FieldsHistory = unserialize( $_SESSION['HISTORY_DATA'] );
+    $FieldsHistory = $_SESSION['HISTORY_DATA'];
     $Fields['APP_DATA'] = $FieldsHistory[$_POST['HISTORY_ID']];
     $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['PREVIOUS_STEP_LABEL'] = '';
     $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['NEXT_STEP_LABEL'] = '';
diff --git a/workflow/engine/methods/cases/casesList_Ajax.php b/workflow/engine/methods/cases/casesList_Ajax.php
index cac07617c..edf1c6098 100755
--- a/workflow/engine/methods/cases/casesList_Ajax.php
+++ b/workflow/engine/methods/cases/casesList_Ajax.php
@@ -549,7 +549,7 @@ if ($actionAjax == 'dynaformChangeLogViewHistory') {
 
     global $G_PUBLISH;
     $G_PUBLISH = new Publisher();
-    $FieldsHistory = unserialize( $_SESSION['HISTORY_DATA'] );
+    $FieldsHistory = $_SESSION['HISTORY_DATA'];
     $Fields['APP_DATA'] = $FieldsHistory[$_POST['HISTORY_ID']];
     $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['PREVIOUS_STEP_LABEL'] = '';
     $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['NEXT_STEP_LABEL'] = '';
diff --git a/workflow/engine/methods/cases/cases_Ajax.php b/workflow/engine/methods/cases/cases_Ajax.php
index 00f663f04..a494ff921 100755
--- a/workflow/engine/methods/cases/cases_Ajax.php
+++ b/workflow/engine/methods/cases/cases_Ajax.php
@@ -700,7 +700,7 @@ switch (($_POST['action']) ? $_POST['action'] : $_REQUEST['action']) {
         break;
     case 'showDynaformHistory':
         $G_PUBLISH = new Publisher();
-        $FieldsHistory = unserialize( $_SESSION['HISTORY_DATA'] );
+        $FieldsHistory = $_SESSION['HISTORY_DATA'];
         $Fields['APP_DATA'] = $FieldsHistory[$_POST['HISTORY_ID']];
         $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['PREVIOUS_STEP_LABEL'] = '';
         $Fields['APP_DATA']['__DYNAFORM_OPTIONS']['NEXT_STEP_LABEL'] = '';
diff --git a/workflow/engine/templates/cases/cases_DynaformHistory.php b/workflow/engine/templates/cases/cases_DynaformHistory.php
index 4e2f511c6..dd00c587c 100755
--- a/workflow/engine/templates/cases/cases_DynaformHistory.php
+++ b/workflow/engine/templates/cases/cases_DynaformHistory.php
@@ -172,7 +172,7 @@ if (!isset($changedValues)) {
     $tpl->assign("noResults", G::LoadTranslation("ID_NO_RECORDS_FOUND"));
 }
 
-$_SESSION['HISTORY_DATA'] = serialize($historyData);
+$_SESSION['HISTORY_DATA'] = $historyData;
 $tpl->gotoBlock("_ROOT");
 
 $tpl->printToScreen();