# Redis Error after update

**URL:** <https://meta.discourse.org/t/redis-error-after-update/219898>\
**Category:** Self-hosting\
**Created:** [March 2, 2022, 11:10pm UTC](https://meta.discourse.org/t/redis-error-after-update/219898 "2022-03-02T23:10:11Z")\
**Posts on this page:** 1\
**Showing post:** 6

<div class="post-metadata">

**Author:** ![Falco](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/falco/32/179432_2.png) [@Falco](https://meta.discourse.org/u/Falco)\
**Post date:** [March 4, 2022, 9:17pm UTC](https://meta.discourse.org/t/redis-error-after-update/219898/6 "2022-03-04T21:17:54Z")

</div>

> [@natasha\_selvidge](#):
>
> /Users/natashaselvidge/discourse/vendor/bundle/ruby/2.6.0/gems/redis-4.6.0

> [@natasha\_selvidge](#):
>
> `Redis::CommandError: ERR unknown command `synchronize`, with args beginning with:`

Looks like you manually update the Redis gem on your dev environment from 4.5.1 to 4.6.0. Discourse doesn’t work with that gem version, so you need to revert back to the version we use on the Gemfile.lock file.

We are working on eventually moving to redis-rb 4.6.0, but that is a lot of work:

[https://github.com/discourse/discourse/pull/15811](https://github.com/discourse/discourse/pull/15811)

---

_[View the full topic](https://meta.discourse.org/t/redis-error-after-update/219898)._