# Failed to update snapshot in repository
**URL:** https://discuss.elastic.co/t/failed-to-update-snapshot-in-repository/300879
**Category:** Elasticsearch
**Tags:** snapshot-and-restore
**Created:** [March 28, 2022, 5:06pm UTC](https://discuss.elastic.co/t/failed-to-update-snapshot-in-repository/300879 "2022-03-28T17:06:01Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@alicango](https://discuss.elastic.co/u/alicango)
#### Post date: [March 28, 2022, 5:06pm UTC](https://discuss.elastic.co/t/failed-to-update-snapshot-in-repository/300879/1 "2022-03-28T17:06:01Z")
I have a cluster that has 3 masters, 2 hot, 2 warms, 2 colds nodes. I am trying to take a snapshot but I got this error;
```auto
"type": "snapshot_exception",
"reason": "[cul-backup:cul-snap-2022.03.28-xxxxxxxxx/xxxxxxxxxx] failed to update snapshot in repository",
"caused_by": {
"type": "repository_exception",
"reason": "[cul-backup] concurrent modification of the index-N file, expected current generation [1] but it was not found in the repository. The last cluster to write to this repository was [_na_] at generation [-1].
"stack_trace": "RepositoryException[[cul-backup] concurrent modification of the index-N file, expected current generation [1] but it was not found in the repository. The last cluster to write to this repository was [_na_] at generation [-1].]\n\tat org.elasticsearch.repositories.blobstore.BlobStoreRepository.ensureSafeGenerationExists(BlobStoreRepository.java:2445"
```
I am using **Shared file system** that is **Type: “fs”** and snapshot data is being created under the **path.repo** successfully;
```auto
ls /mnt/data/sharing/es_backup/cul_snapshot/
indices meta-xxxxxxxx.dat snap-xxxxxxxxxx.dat
```
Also, Repository Verification status is connected for all cluster's nodes
I have also deleted the repository and recreated again to solve this issue but it didn't work.
How can I solve this issue?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 25, 2022, 5:06pm UTC](https://discuss.elastic.co/t/failed-to-update-snapshot-in-repository/300879/2 "2022-04-25T17:06:15Z")
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