SOLVED Fresh install and apt problem

Hi, can someone help me with this error? It's a fresh install on a laptop.

sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
4 not fully installed or removed.
Need to get 0 B/69.1 MB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up initramfs-tools (0.142+deb12u3) ...
update-initramfs: deferring update (trigger activated)
Setting up linux-image-6.1.0-37-rt-amd64 (6.1.140-1) ...
/etc/kernel/postinst.d/dkms:
dkms: running auto installation service for kernel 6.1.0-37-rt-amd64........]
dkms: autoinstall for kernel: 6.1.0-37-rt-amd64.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-6.1.0-37-rt-amd64
raspi-firmware: missing /boot/firmware, did you forget to mount it?
run-parts: /etc/initramfs/post-update.d//z50-raspi-firmware exited with return code 1
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-6.1.0-37-rt-amd64 (--configure):
 installed linux-image-6.1.0-37-rt-amd64 package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of linux-image-rt-amd64:
 linux-image-rt-amd64 depends on linux-image-6.1.0-37-rt-amd64 (= 6.1.140-1); however:
  Package linux-image-6.1.0-37-rt-amd64 is not configured yet.

dpkg: error processing package linux-image-rt-amd64 (--configure):
 dependency problems - leaving unconfigured
Processing triggers for initramfs-tools (0.142+deb12u3) ...
update-initramfs: Generating /boot/initrd.img-6.1.0-37-rt-amd64
raspi-firmware: missing /boot/firmware, did you forget to mount it?
run-parts: /etc/initramfs/post-update.d//z50-raspi-firmware exited with return code 1
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 linux-image-6.1.0-37-rt-amd64
 linux-image-rt-amd64
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1) 

This is a known Debian bug
try
sudo apt purge --autoremove raspi-firmware
sudo apt update

Did not work.

sudo apt purge --autoremove raspi-firmware
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  linux-image-6.1.0-35-rt-amd64 raspi-firmware*
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
4 not fully installed or removed.
After this operation, 409 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 230177 files and directories currently installed.)
Removing linux-image-6.1.0-35-rt-amd64 (6.1.137-1) ...
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-6.1.0-35-rt-amd64
/etc/kernel/postrm.d/z50-raspi-firmware:
raspi-firmware: missing /boot/firmware, did you forget to mount it?
run-parts: /etc/kernel/postrm.d/z50-raspi-firmware exited with return code 1
dpkg: error processing package linux-image-6.1.0-35-rt-amd64 (--remove):
 installed linux-image-6.1.0-35-rt-amd64 package post-removal script subprocess returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
 linux-image-6.1.0-35-rt-amd64
Processing was halted because there were too many errors.
W: Can not find PkgVer for 'raspi-firmware'
E: Sub-process /usr/bin/dpkg returned an error code (1)

This solved it.
sudo rm /etc/{initramfs/post-update.d/,kernel/{postinst.d/,postrm.d/}}z50-raspi-firmware

Champion!