When a PR have both `backport/v1.24` and `backport/v1.25`. The PR will only be backport to v1.25 but not v1.24. i.e. https://github.com/go-gitea/gitea/pull/35591 https://github.com/go-gitea/gitea/pull/35584 https://github.com/go-gitea/gitea/pull/35560