Problems with update

Troubleshooting
1

I wanted to install new software (docker). Then, it ran the update-process, which failed with the fallowing error-msg:

│  - Exit code: 100

│  - DietPi version: v10.6.2 (MichaIng/master) | HW_MODEL: 21 |
 │ HW_ARCH: 10 | DISTRO: 8
 │  - Error log:
 │ Hit:1  trixie InRelease
 │ Hit:2 trixie-updates InRelease
 │ Hit:3  trixie-security
 │ InRelease
 │   Sub-process /usr/bin/sqv returned an error code (1), error message
 │ is: Signing key on CD665CBA0E2F88B7373F7CB997203C7B3ADCA79D is not
 │ bound:            No binding signature at time 2025-09-22T18:33:03Z
 │ because: Policy rejected non-revocation signature
 │ (PositiveCertification) requiring second pre-image resistance
 because: SHA1 is not considered secure since 2026-02-01T00:00:00Z
 │ Hit:8  trixie InRelease
  │ Fetched 6685 B in 0s (22.0 kB/s)
 │ Reading package lists...

Native PC (x86_64) | IP: 192.168.0.x | Use up/down buttons to scroll text
 │ W: An error occurred during the signature verification. The
 │ repository is not updated and the previous index files will be used.
 │ OpenPGP signature verification failed:
 │ https://downloads.plex.tv/repo/deb public InRelease: Sub-process
 │ /usr/bin/sqv returned an error code (1), error message is: Signing
 │ key on CD665CBA0E2F88B7373F7CB997203C7B3ADCA79D is not bound:
 │ No binding signature at time 2025-09-22T18:33:03Z   because: Policy
 │ rejected non-revocation signature (PositiveCertification) requiring
 │ second pre-image resistance   because: SHA1 is not considered secure
 │ since 2026-02-01T00:00:00Z
 │ E: Failed to fetch
 │ https://downloads.plex.tv/repo/deb/dists/public/InRelease
 │ Sub-process /usr/bin/sqv returned an error code (1), error message
 │ is: Signing key on CD665CBA0E2F88B7373F7CB997203C7B3ADCA79D is not
 │ bound:            No binding signature at time 2025-09-22T18:33:03Z
 │ because: Policy rejected non-revocation signature
 │ (PositiveCertification) requiring second pre-image resistance
 │ because: SHA1 is not considered secure since 2026-02-01T00:00:00Z
 │ E: Some index files failed to download. They have been ignored, or
 │ old ones used instead.

Any ideas out there?

How can I fix this problem. Thank you very much for your help!

2

You are using an outdated Plex APT repository. Did you install Plex manually or via dietpi-software?

If installed via dietpi-software, it should have been updated and cleaned up with DietPi v10.1, so I guess you installed it manually.

If you installed it manually, here is the updated docs: Enable repository updating for supported Linux server distributions | Plex Support
Before following them, I suggest to cleanup the mess the Plex package did leave behind:

rm -f /etc/apt/sources.list.d/plexmediaserver.list
rm -f /etc/apt/sources.list.d/plex.list
rm -f /usr/share/keyrings/plexmediaserver.gpg
rm -f /usr/share/keyrings/plexmediaserver.v2.gpg
rm -f /etc/apt/keyrings/plexmediaserver.v2.gpg
rm -f /etc/apt/keyrings/plexmediaserver.gpg

For reference: Issue Upgrading to PMS 1.43.0.10467 on Debian and RHEL based distributions - Plex Media Server - Plex Forum