Unable to change build attached to version in App Store Connect

I have an app version (1.2.1) in App Store Connect that is showing "Ready for Review" status. It has an old build (1.2.0, build 4) attached to it. I uploaded a new build today (1.2.1, build 5) and need to swap it in, but there is no "+" or "-" button in the Build section of the version page, and clicking the current build number just navigates to its metadata page.

I have tried:

  • Creating a new version (1.2.1) — it auto-populated with the old build
  • Uploading a new build with the correct version string — still no option to swap
  • Looking for a "Remove from Review" button — it does not exist on my page

Is there a way to detach the current build and attach the new one, or do I need to delete the version and start fresh? If so, will that affect my existing review thread with Apple? Any help appreciated.

Unable to change build attached to version in App Store Connect
 
 
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