# Unable to save category settings made by plugins

**URL:** https://meta.discourse.org/t/unable-to-save-category-settings-made-by-plugins/400699
**Category:** Bug
**Tags:** events, restricted-replies
**Created:** [April 15, 2026, 2:12pm UTC](https://meta.discourse.org/t/unable-to-save-category-settings-made-by-plugins/400699 "2026-04-15T14:12:23Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![martin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/martin/32/491371_2.png) [@martin](https://meta.discourse.org/u/martin)
#### Post date: [April 17, 2026, 12:14am UTC](https://meta.discourse.org/t/unable-to-save-category-settings-made-by-plugins/400699/8 "2026-04-17T00:14:09Z")

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> [@RGJ](#):
>
> - There was no announcement (at least, I cannot find it, and @moin hasn’t pointed it out to me (yet) 😉 )
> - There was no attempt to mitigate this with some blanket code in core

We had both [Simplified category setup](https://meta.discourse.org/t/simplified-category-setup/394971) and the upcoming change in the admin UI (and probably a what’s new item too):

 ![image](https://global.discourse-cdn.com/meta/original/4X/5/2/6/5266a8a813cfafe3311a7a08269b9e448c8e76b1.png)

You should have received notifications about this change both when it appeared on your site and when it was automatically enabled, which is likely only this week when the change was moved to Stable status.

As Kris said, the mitigation is the upcoming change in core, which gives you time to migrate things:

> [@awesomerobot](#):
>
> you can see how the form structure branches with ` {{#if this.siteSettings.enable_simplified_category_creation}}` and how the form if structured using formkit and data from `@outletArgs.form`. The old form structure is still there after `{{else}}` for legacy support.

What else would have helped you in this case? We could add some extra details in the upcoming change linked topic with details on what developers need to do to prepare.

As for developer warnings, I can consult with the #dev-xp team to see if there is something better we can do next time.

* * *

We will fix these today, we must not have had adequate test coverage here, because nothing from these plugins failed when I did [DEV: Move enable\_simplified\_category\_creation to stable by martin-brennan · Pull Request #39212 · discourse/discourse · GitHub](https://github.com/discourse/discourse/pull/39212) , but other plugins did:

> [@RGJ](#):
>
> Discourse
> 
> - calendar ← official Discourse plugin
> - restricted replies ← official Discourse plugin

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