我的apt-get update命令失败并出现以下错误：
N: Repository 'http://at.archive.ubuntu.com/ubuntu jammy-backports InRelease' changed its 'Suite' value from 'jammy-updates' to 'jammy-backports'
E: Repository 'http://at.archive.ubuntu.com/ubuntu jammy-backports InRelease' changed its default priority for apt_preferences(5) from 500 to 100.
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
我担心安全问题。为什么我会看到此错误？这是什么意思？