diff --git a/src/Database/Table/GroupedSelection.php b/src/Database/Table/GroupedSelection.php
index e6ae366ba..b3d74c5a6 100644
--- a/src/Database/Table/GroupedSelection.php
+++ b/src/Database/Table/GroupedSelection.php
@@ -176,6 +176,14 @@ protected function execute()
 	}
 
 
+	protected function emptyResultSet($saveCache = TRUE)
+	{
+		parent::emptyResultSet($saveCache);
+
+		$this->refCacheCurrent['data'] = NULL;
+	}
+
+
 	protected function getRefTable(& $refPath)
 	{
 		$refObj = $this->refTable;