PVE Upgrade - Receive Hash Sum Mismatch

coolsport00

New Member
May 14, 2026
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USA
Somewhat new to Proxmox. Trying to do a simple Upgrade task after new install of v9.1.1 and received the following error:
1785419488096.png

Some troubelshooting I've tried:
Code:
rm -R /var/lib/apt/lists/*
apt clean
apt update

Also, I've disabled the Enterprise Repo so I wouldn't get any errors for that.

Any idea how to fix this error? Thanks in advance for the assist!
 
1. if you do not have a subscription, you still need to enable one of the other repositories
2. the error indicates network issues on your end, it's also not about our repository (CDN), but about Debian's (the IP belongs to fastly, which is the CDN backing deb.debian.org)
 
Hi @fabian - thanks for the response. I added the No-Subscription Repo. Sorry I didn't mention that; but the 2 Ent Repos I disabled.
Yeah, I've seen this behavior on Ubuntu as well, so my guess is something changed with Apt and/or how Pkg distribution to mirrors/repos are handled some how.

I didn't really do anything different than what I shared above, but at some point, all my pkgs did update. It never went through "successfully" in Terminal. But when I ran an "apt update", it stated no pkgs need updating. Not sure why/how. And, the 6pkgs I was getting the mismatch error on, I checked the version on using "dpkg -s <pkgname> | grep -i '^Version:' " and they showed as upgraded. And now no Update Pkgs show in Proxmox. *shrug* Not sure how. The only thing I did change/try was the repo configured in "debian.sources". I changed to "ftp.us.debian.org/debian". I was still getting mismatch errors, but again...at some point, they did upgrade.

Thank you.