Sites deployment fails with HTTP 409 when updating login callbacks

What version of the Codex App are you using (From “About Codex” dialog)?

26.901.51231 (build 8109)

What subscription do you have?

prolite (plan type reported by Codex)

What platform is your computer?

macOS — Darwin 25.5.0 arm64 arm

What issue are you seeing?

My Sites website was initially published successfully. After adding and activating a custom domain, subsequent deployments repeatedly failed while updating the Sign in with ChatGPT callback configuration.

Website: https://ielts.guolinhuan.com

Error:
HTTP 409 Conflict when updating the site's login callbacks.

Version 2 was saved successfully, but deployment fails and the live website continues to show the previous version. Multiple retries produced the same error.

The custom domain and HTTPS certificate are active. The exact cause of the callback conflict is unknown.

What steps can reproduce the bug?

Feedback ID: 01a08160-8886-7361-be4d-8e31c7fe56e6

What is the expected behavior?

Deploying a saved version should succeed while preserving the existing custom domain, owner-only access, and login configuration.

The live website should display the changes from version 2 after deployment.

Additional information

Project ID:
appgprj_6aa019d6a034819189d2356592588895

Saved version ID:
appgprj_6aa019d6a034819189d2356592588895~appgver_74bccd8b6018819197e83b4de8ac7298

Latest failed deployment ID:
appgdep_6aa03085626081918ccea9611d34239f

Failure time:
2026-09-08 15:58 UTC

The production build and TypeScript checks passed before publishing.

Start with the feedback ID 01a08160-8886-7361-be4d-8e31c7fe56e6 and inspect the failed deployment ID appgdep_6aa03085626081918ccea9611d34239f alongside the project and saved version IDs. The issue is resolved when a saved version deploys successfully, the custom domain and owner-only access remain intact, and the live site shows the new version.