Ubuntu 22.04本地APT仓库配置后执行apt-get update频繁出现Ign记录的问题求助

各位大佬好，我最近遇到个棘手的问题想请教下：我用apt-mirror搭建了本地Ubuntu仓库，同步了amd64和i386架构的Jammy版本全系列包，我的mirror.list配置如下：

deb-amd64 http://archive.ubuntu.com/ubuntu jammy            main restricted universe multiverse
deb-amd64 http://archive.ubuntu.com/ubuntu jammy-security   main restricted universe multiverse
deb-amd64 http://archive.ubuntu.com/ubuntu jammy-updates    main restricted universe multiverse
deb-amd64 http://archive.ubuntu.com/ubuntu jammy-backports  main restricted universe multiverse

deb-i386 http://archive.ubuntu.com/ubuntu jammy            main restricted universe multiverse
deb-i386 http://archive.ubuntu.com/ubuntu jammy-security   main restricted universe multiverse
deb-i386 http://archive.ubuntu.com/ubuntu jammy-updates    main restricted universe multiverse
deb-i386 http://archive.ubuntu.com/ubuntu jammy-backports  main restricted universe multiverse

clean http://archive.ubuntu.com/ubuntu

之后我在一台无网络的PC上，把sources.list指向了外接USB硬盘里的本地仓库，配置大概是这样：

deb [trusted=yes] file:/media/$username$/$disk_name$/repo/mirror/archive.ubuntu.com/ubuntu jammy main restricted universe multiverse
....

但执行sudo apt-get update后，输出里全是类似这样的内容：

Get 1: blah-blah-blah
Ign 1: blah-blah-blah

我还试着用apache2搭建web服务来提供仓库，结果问题还是一模一样。已经谷歌好几天了都没找到能解决的办法，有没有大佬能帮我排查下哪里出问题了呀？

备注：内容来源于stack exchange，提问作者ComradDart