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Debian apt-get update で「changed its 'Suite' value from 'testing' to 'stable'」というエラーが出る場合の対処法

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Debian 10.0 busterが2019/7/6にリリース。
先週までtestingだったのが、今週からstableになるということ。
testing時代からbusterを使っている場合、apt updateのとき、タイトルのようなエラーが出る

エラー内容

ローカルのapt DBとリモートのapt DBのリリース差異があるというエラー。
ローカルのapt DB busterはtestingとなっているのに、今回取得したapt DBはstableなので不一致となってるらしい。

こんなエラー。

% sudo aptitude update
Get: 1 http://debian-mirror.sakura.ne.jp/debian buster InRelease [118 kB]
Get: 2 http://debian-mirror.sakura.ne.jp/debian buster-updates InRelease [46.8 kB]
Get: 3 http://security.debian.org/debian-security buster/updates InRelease [39.1 kB]
Fetched 204 kB in 2s (126 kB/s)
E: Repository 'http://debian-mirror.sakura.ne.jp/debian buster InRelease' changed its 'Suite' value from 'testing' to 'stable'
E: Repository 'http://debian-mirror.sakura.ne.jp/debian buster-updates InRelease' changed its 'Suite' value from 'testing-updates' to 'stable-updates'
E: Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Suite' value from 'testing' to 'stable'
E: Failed to download some files
W: Failed to fetch http://debian-mirror.sakura.ne.jp/debian/dists/buster/InRelease:
W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease:
W: Failed to fetch http://debian-mirror.sakura.ne.jp/debian/dists/buster-updates/InRelease:
E: Some index files failed to download. They have been ignored, or old ones used instead.

前までこんなんでてたっけ

対処法

リリース情報の更新を許可する。
参考 : https://superuser.com/questions/1456989/how-to-configure-apt-in-debian-buster-after-release

% sudo apt-get update --allow-releaseinfo-change

実行例。

Get:1 http://security.debian.org/debian-security buster/updates InRelease [39.1 kB]
Get:2 http://debian-mirror.sakura.ne.jp/debian buster InRelease [118 kB]
Get:3 http://debian-mirror.sakura.ne.jp/debian buster-updates InRelease [46.8 kB]
Get:4 http://security.debian.org/debian-security buster/updates/main Sources [1,984 B]
Get:5 http://security.debian.org/debian-security buster/updates/main amd64 Packages [1,864 B]
Get:6 http://security.debian.org/debian-security buster/updates/main Translation-en [1,660 B]
Get:7 http://debian-mirror.sakura.ne.jp/debian buster/main Sources [7,827 kB]
Get:8 http://debian-mirror.sakura.ne.jp/debian buster/main amd64 Packages [7,897 kB]
Get:9 http://debian-mirror.sakura.ne.jp/debian buster/main Translation-en [5,967 kB]
Fetched 21.9 MB in 6s (3,640 kB/s)
Reading package lists... Done
N: Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Version' value from '' to '10'
N: Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Suite' value from 'testing' to 'stable'
N: Repository 'http://debian-mirror.sakura.ne.jp/debian buster InRelease' changed its 'Version' value from '' to '10.0'
N: Repository 'http://debian-mirror.sakura.ne.jp/debian buster InRelease' changed its 'Suite' value from 'testing' to 'stable'
N: Repository 'http://debian-mirror.sakura.ne.jp/debian buster-updates InRelease' changed its 'Suite' value from 'testing-updates' to 'stable-updates'

確認

さっきエラーになったコマンド

% sudo aptitude update
Hit http://debian-mirror.sakura.ne.jp/debian buster InRelease
Hit http://debian-mirror.sakura.ne.jp/debian buster-updates InRelease
Hit http://security.debian.org/debian-security buster/updates InRelease

よさそうです。

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