# Proxmox: TASK ERROR: API Return-Code: 500. Message: Could not rollback cluster wide snapshot

**URL:** <https://forums.linbit.com/t/proxmox-task-error-api-return-code-500-message-could-not-rollback-cluster-wide-snapshot/690>\
**Category:** LINSTOR\
**Tags:** drbd\
**Created:** [March 24, 2025, 7:52am UTC](https://forums.linbit.com/t/proxmox-task-error-api-return-code-500-message-could-not-rollback-cluster-wide-snapshot/690 "2025-03-24T07:52:06Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Hiu](https://yyz1.discourse-cdn.com/flex003/user_avatar/forums.linbit.com/hiu/32/140_2.png) [@Hiu](https://forums.linbit.com/u/Hiu)\
**Post date:** [March 24, 2025, 1:51pm UTC](https://forums.linbit.com/t/proxmox-task-error-api-return-code-500-message-could-not-rollback-cluster-wide-snapshot/690/9 "2025-03-24T13:51:02Z")

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Answering my own question. 😁

Found this [drbd-9.2.13-rc.1](https://forums.linbit.com/t/drbd-9-2-13-rc-1/669) announcement addressing an issue with lvm-thin:

> LINSTOR sets the  
> rs-discard-granularity when the backing devices are thinly provisioned  
> (lvm-thin or zfs-thin).

I don’t quite understand what it’s about and there’s nothing more to read about it in the release notes of [drbd-9.2.13](https://forums.linbit.com/t/drbd-9-2-13/692), but maybe I should give it a try.

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