Index: branches/5.2.x/core/kernel/db/cat_event_handler.php
===================================================================
--- branches/5.2.x/core/kernel/db/cat_event_handler.php
+++ branches/5.2.x/core/kernel/db/cat_event_handler.php
@@ -771,7 +771,10 @@
 	protected function prepareObject(&$object, kEvent $event)
 	{
 		$this->prepareItemStatuses($event);
-		$object->addCalculatedField('CachedNavbar', 'l' . $this->Application->GetVar('m_lang') . '_CachedNavbar');
+		$object->addCalculatedField(
+			'CachedNavbar',
+			TABLE_PREFIX . 'Categories.l' . $this->Application->GetVar('m_lang') . '_CachedNavbar'
+		);
 
 		if ( $event->Special == 'export' || $event->Special == 'import' ) {
 			/** @var kCatDBItemExportHelper $export_helper */