# Problem with post revisions after updating to 2.8.6 stable or 2.9.0.beta7

**URL:** https://meta.discourse.org/t/problem-with-post-revisions-after-updating-to-2-8-6-stable-or-2-9-0-beta7/232885
**Category:** Bug
**Created:** [July 14, 2022, 3:34pm UTC](https://meta.discourse.org/t/problem-with-post-revisions-after-updating-to-2-8-6-stable-or-2-9-0-beta7/232885 "2022-07-14T15:34:21Z")
**Posts on this page:** 1
**Showing post:** 19

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### Author: ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)
#### Post date: [July 15, 2022, 3:28pm UTC](https://meta.discourse.org/t/problem-with-post-revisions-after-updating-to-2-8-6-stable-or-2-9-0-beta7/232885/19 "2022-07-15T15:28:58Z")

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@darkpixlz please can you follow these steps and let us know what you find:

> [@david](#):
>
> Please can you visit `/logs` and look for any errors like
> 
> ```plaintext
> Psych::DisallowedClass (Tried to load unspecified class: Time)
> 
> ```
> 
> The “Time” version is the only one we were seeing, and should now be resolved. What other ‘unspecified class’ errors do you see in your logs?

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