// Purge deleted tasks (no notification to admin)
SQL_QUERY_ESC("DELETE LOW_PRIORITY
-FROM `{!MYSQL_PREFIX!}_task_system`
+FROM `{!_MYSQL_PREFIX!}_task_system`
WHERE status='DELETED' AND task_created <= (UNIX_TIMESTAMP() - %s)",
array($since), __FILE__, __LINE__);
$DELETED = SQL_AFFECTEDROWS();