diff --git a/workflow/engine/methods/cases/proxyCasesList.php b/workflow/engine/methods/cases/proxyCasesList.php
index d78f4a33d..359062b29 100755
--- a/workflow/engine/methods/cases/proxyCasesList.php
+++ b/workflow/engine/methods/cases/proxyCasesList.php
@@ -26,6 +26,10 @@ $dateFrom = isset( $_POST["dateFrom"] ) ? substr( $_POST["dateFrom"], 0, 10 ) :
 $dateTo = isset( $_POST["dateTo"] ) ? substr( $_POST["dateTo"], 0, 10 ) : "";
 $first = isset( $_POST["first"] ) ? true :false;
 
+if ($sort == 'CASE_SUMMARY' || $sort == 'CASE_NOTES_COUNT') {
+    $sort = 'APP_NUMBER';//DEFAULT VALUE
+}
+
 try {
     $userUid = (isset($_SESSION["USER_LOGGED"]) && $_SESSION["USER_LOGGED"] != "")? $_SESSION["USER_LOGGED"] : null;
     $result = "";
diff --git a/workflow/engine/templates/cases/casesList.js b/workflow/engine/templates/cases/casesList.js
index ecb380a61..4a1ab8831 100644
--- a/workflow/engine/templates/cases/casesList.js
+++ b/workflow/engine/templates/cases/casesList.js
@@ -573,6 +573,9 @@ Ext.onReady ( function() {
     if( c.dataIndex == 'CASE_SUMMARY')          c.renderer = renderSummary;
     if( c.dataIndex == 'CASE_NOTES_COUNT')      c.renderer = renderNote;
 
+    if( c.dataIndex == 'CASE_SUMMARY')          c.sortable = false;
+    if( c.dataIndex == 'CASE_NOTES_COUNT')      c.sortable = false;
+
     //Format the name if is disabled solr, otherwise show without format
     if (solrEnabled == 0) {
         if( c.dataIndex == 'APP_DEL_PREVIOUS_USER') c.renderer = previous_full_name;