Forgejo connection fails to fork if a fork with an unexpected name already exists

[Jak2k]

Describe the bug

Login doesn't work if I already have a forgejo fork but with a different name than upstream.

To Reproduce

1. Fork https://codeberg.org/DI-Day/website/ as diday-website
2. Sign in at https://diday.org/admin/ using Forgejo
3. Click "Fork"
4. See error

Expected behavior

It uses my existing fork as intended.

Screenshots

Applicable Versions:

• Decap CMS version: 3.10.0
• Git provider: Forgejo
• OS: FUCKBOI 26.05 (Yarara)
• Browser version: Firefox 150

• Node.JS version: -

CMS configuration

https://codeberg.org/DI-Day/website/src/branch/main/public/admin/config.yml

Additional context

[martinjagodic]

@Jak2k please add a good issue title