---
title: "Aerospike Backup Service 3.5.1 release notes"
description: "Aerospike Backup Service 3.5.1 release notes, a hotfix for backups failing on namespaces with a set index or other unrecognized secondary index type."
---

# Aerospike Backup Service 3.5.1 release notes

> For the complete documentation index see: [llms.txt](https://aerospike.com/docs/llms.txt)
> 
> All documentation pages available in markdown.

August 27, 2026  |  **[Download](https://aerospike.com/download/backupservice/backup_service)**

Aerospike Backup Service (ABS) 3.5.1 is a hotfix release built on [`backup-go` v0.10.1](https://github.com/aerospike/backup-go/releases/tag/v0.10.1).

## Bug fixes

-   Fixed a bug that could fail an entire namespace backup when [`sindex-list`](https://aerospike.com/docs/database/reference/info/#sindex-list) returned an index type that ABS did not recognize, including [set indexes](https://aerospike.com/docs/database/learn/architecture/data-storage/set-index) (Aerospike Database 8.1.2 and later). ABS now logs a warning and skips indexes with an unrecognized type instead of failing the backup. Set indexes themselves remain unsupported for backup. \[BKRS-334\]

For additional details about fixes, improvements, and maintenance in this release, see the [release page on GitHub](https://github.com/aerospike/aerospike-backup-service/releases/tag/v3.5.1).