So I’ve been trying to update/upgrade my system/applications for the last few days and it has been erroring, I ignored it and now when I try to sudo apt upgrade it tells me that I have “Low Disk Space on “boot” The volume “boot” has only 0 bytes disk space remaining.”

What happens when I run sudo apt upgrade:

user@user:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
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.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up initramfs-tools (0.136ubuntu6.6) ...
update-initramfs: deferring update (trigger activated)
Setting up linux-firmware (1.187.25) ...
update-initramfs: Generating /boot/initrd.img-5.11.0-43-generic
I: The initramfs will attempt to resume from /dev/dm-2
I: (/dev/mapper/data-swap)
I: Set the RESUME variable to override this.
Error 24 : Write error : cannot write compressed block 
E: mkinitramfs failure cpio 141 lz4 -9 -l 24
update-initramfs: failed for /boot/initrd.img-5.11.0-43-generic with 1.
dpkg: error processing package linux-firmware (--configure):
 installed linux-firmware package post-installation script subprocess returned error exit status 1
Setting up linux-image-5.11.0-44-generic (5.11.0-44.48~20.04.2) ...
I: /boot/initrd.img.old is now a symlink to initrd.img-5.11.0-44-generic
Setting up linux-image-5.11.0-46-generic (5.11.0-46.51~20.04.1) ...
I: /boot/initrd.img is now a symlink to initrd.img-5.11.0-46-generic
Processing triggers for initramfs-tools (0.136ubuntu6.6) ...
update-initramfs: Generating /boot/initrd.img-5.11.0-43-generic
I: The initramfs will attempt to resume from /dev/dm-2
I: (/dev/mapper/data-swap)
I: Set the RESUME variable to override this.
Error 24 : Write error : cannot write compressed block 
E: mkinitramfs failure cpio 141 lz4 -9 -l 24
update-initramfs: failed for /boot/initrd.img-5.11.0-43-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1
Processing triggers for linux-image-5.11.0-44-generic (5.11.0-44.48~20.04.2) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.11.0-44-generic
I: The initramfs will attempt to resume from /dev/dm-2
I: (/dev/mapper/data-swap)
I: Set the RESUME variable to override this.
Error 24 : Write error : cannot write compressed block 
E: mkinitramfs failure cpio 141 lz4 -9 -l 24
update-initramfs: failed for /boot/initrd.img-5.11.0-44-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-5.11.0-44-generic (--configure):
 installed linux-image-5.11.0-44-generic package post-installation script subprocess returned error exit status 1
Processing triggers for linux-image-5.11.0-46-generic (5.11.0-46.51~20.04.1) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.11.0-46-generic
I: The initramfs will attempt to resume from /dev/dm-2
I: (/dev/mapper/data-swap)
I: Set the RESUME variable to override this.
Error 24 : Write error : cannot write compressed block 
E: mkinitramfs failure cpio 141 lz4 -9 -l 24
update-initramfs: failed for /boot/initrd.img-5.11.0-46-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-5.11.0-46-generic (--configure):
 installed linux-image-5.11.0-46-generic package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 linux-firmware
 initramfs-tools
 linux-image-5.11.0-44-generic
 linux-image-5.11.0-46-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)

Screenshot of /boot:

I am running elementary OS 6.1 Jólnir, built on Ubuntu 20.04.3 LTS using the Linux kernel 5.11.0-43-generic.

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