New comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/issues/30420#issuecomment-824728696

Comment:
> Given that the multilib repo is exclusively x86_64 packages, and your suggestion is to clean it by an unrelated architecture, this feels like an XBPS bug.

The problem is that i686 writes the repo. This comes down to the same issue with running the cleanup in a cronjob instead of part of the build pipeline, there is a inherent race condition between `xbps-create` creating the package and then `xbps-rindex` adding the packages to the repository index: While the `.xbps` archives for the specific architecture are not in the `-repodata`, they are considered obsolete.