API_ERROR __ is not a valid ref name

**Describe the bug**
When attempting to save pages, an API ERROR will come up stating the article's name isn't a valid ref name.

**To Reproduce**
1. [Go to example page](https://cheeseepedia.org/admin/#/collections/Showtapes/entries/Chuck%20E%20Cheese%20Hicksville%20Grand%20Re-Opening%20Show)
2. Edit Article
3. Save Article
4. See error

**Expected behavior**

**Screenshots**

**Applicable Versions:**
- Decap CMS version: 3.4.0
- Git provider: Github
- OS: POP OS
- Browser version Firefox

**CMS configuration**
https://github.com/The64thGamer/cheeseepedia/blob/main/static/admin/config.yml

**Additional context**
This started happening after I had issues where changing an article would rename it and save it under a different file (eg "My Article.html" into "my-article.html"). I messed with article slugs and settings a few times to try and have it save under the original filename, but then this error happened.