Open Beta v6.23 | Please help testing and hardening the upcoming release

All infos:

All testers are highly appreciated and we will assist quickly if any issue appears.

I received the following error when trying to update dietpi from a Odroid H2.
Please advise. Thanks, Wil
───────────────────────────────┤ DietPi Error Handler: ├────────────────────────────────┐
│ DietPi-Update: G_AGUP
│ - Exit code: 100
│ - DietPi version: v6.21.1 (Fourdee/master) | HW_MODEL:11 | HW_ARCH:2 | DISTRO:4
│ - Image creator: DietPi Core Team
│ - Pre-image: Meveric

│ Log file contents:
│ Hit:1 bionic InRelease
│ Hit:2 all InRelease
│ Hit:3 stretch InRelease
│ Ign:7 -pgdg InRelease
│ Hit:9 stretch-pgdg InRelease
│ Ign:10 -pgdg Release
│ Ign:4 stretch InRelease
│ Hit:5 stretch-updates InRelease

│ Retry : Re-run the last command that failed
│ DietPi-Config : Edit network, APT/NTP mirror settings etc

Could you please provide the full output of:
apt update

Here you go:
root@DietPi:~# apt update
Hit:1 bionic InRelease
Hit:2 all InRelease
Hit:3 stretch InRelease
Ign:4 -pgdg InRelease
Hit:5 stretch-pgdg InRelease
Err:6 -pgdg Release
404 Not Found [IP: 80]
Hit:7 all InRelease
Ign:8 stretch InRelease
Get:9 stretch-updates InRelease [91.0 kB]
Get:10 stretch/updates InRelease [94.3 kB]
Get:11 stretch-backports InRelease [91.8 k B]
Hit:12 stretch Release
Reading package lists… Done
E: The repository ‘ -pgdg Release’ does not have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Skipping acquire of configured file ‘main/binary-armhf/Packages’ as repository ‘ stretch-pgdg InRelease’ doesn’t support architecture ‘armhf’

The postgreSQL repository you applied does not support ARM, so it should have never worked to install postgreSQL with this, was it?

How did you apply this? However please remove the repo. It should be one of the files in: /etc/apt/sources.list.d/

It helped in removing these lines. DietPi is updated now.
Thanks for your support!
Regards, Wil