diff --git a/pandora_console/include/functions_alerts.php b/pandora_console/include/functions_alerts.php
index c9ab918624..b3a8cabf27 100644
--- a/pandora_console/include/functions_alerts.php
+++ b/pandora_console/include/functions_alerts.php
@@ -3115,7 +3115,7 @@ function alerts_get_alert_fired($filters=[], $groupsBy=[])
                 $fields[] = $table.'.id_agente as agent';
                 $group_array[] = $table.'.id_agente';
                 $names_search = agents_get_alias_array(
-                    array_values($filters['agents'])
+                    array_values($filters['agents'] ?? [])
                 );
 
                 if (is_metaconsole() === true) {