unable to update dietpi to latest version

[hcr2020]

Details:

• Date | Fri Jul 12 19:40:13 BST 2024
• Bug report | 6dbbd6b4-823d-4de3-b099-33ee20fb991d
• DietPi version | v9.5.1 (MichaIng/master)
• Image creator |
• Pre-image |
• Hardware | ROCK64 (aarch64) (ID=43)
• Kernel version | Linux DietPi 6.1.63-current-rockchip64 #1 SMP PREEMPT Mon Nov 20 10:52:19 UTC 2023 aarch64 GNU/Linux
• Distro | bullseye (ID=6)
• Command | apt-get -y --with-new-pkgs upgrade
• Exit code | 100
• Software title | DietPi-Update

Steps to reproduce:

1. ...
2. ...

Expected behaviour:

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Actual behaviour:

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Extra details:

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Additional logs:

Reading package lists...
Building dependency tree...
Reading state information...
Calculating upgrade...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
3 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up exim4-config (4.94.2-7+deb11u3) ...
/usr/sbin/update-exim4.conf: 467: cannot create /dev/null: File exists
Invalid new configfile /var/lib/exim4/config.autogenerated.tmp, not installing 
/var/lib/exim4/config.autogenerated.tmp to /var/lib/exim4/config.autogenerated
dpkg: error processing package exim4-config (--configure):
 installed exim4-config package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of exim4-base:
 exim4-base depends on exim4-config (>= 4.94) | exim4-config-2; however:
  Package exim4-config is not configured yet.
  Package exim4-config-2 is not installed.
  Package exim4-config which provides exim4-config-2 is not configured yet.

dpkg: error processing package exim4-base (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of exim4-daemon-light:
 exim4-daemon-light depends on exim4-base (>= 4.94.2); however:
  Package exim4-base is not configured yet.

dpkg: error processing package exim4-daemon-light (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 exim4-config
 exim4-base
 exim4-daemon-light
E: Sub-process /usr/bin/dpkg returned an error code (1)

I am unable to update dietpi to latest version, due to exim4-config; exim4-base; exim-daemon-light upgrade error and /usr/bin/apt-key: 57: cannot create /dev/null: Permission denied

Thank you in advance