The old kernel version is still running after update (6 replies)

Hello,
I have a Netgear Stora with debian 10.8 and 5.9.3-kirkwood-tld-1 kernel.

I have never had problems updating the kernel so far but ... I can no longer update the 5.9.3 kernel to the newer versions (5.9.12 and 5.10.7).
Here is the usual procedure that I normally use:

# cd /boot

# wget --no-check-certificate https://www.dropbox.com/s/drui4fx7npx8acc/linux-5.9.12-kirkwood-tld-1-bodhi.tar.bz2
# md5sum linux-5.9.12-kirkwood-tld-1-bodhi.tar.bz2

# tar -xjf linux-5.9.12-kirkwood-tld-1-bodhi.tar.bz2
# tar -xf linux-dtb-5.9.12-kirkwood-tld-1.tar

# dpkg -i linux-image-5.9.12-kirkwood-tld-1_1.0_armel.deb
# mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n Linux-5.9.12-kirkwood-tld-1 -d vmlinuz-5.9.12-kirkwood-tld-1 uImage
# mkimage -A arm -O linux -T ramdisk -C gzip -a 0x00000000 -e 0x00000000 -n initramfs-5.9.12-kirkwood-tld-1 -d initrd.img-5.9.12-kirkwood-tld-1 uInitrd

# sync
# sync
# sync
# shutdown -r now

# uname -r
5.9.3-kirkwood-tld-1


there were no errors, the kernel just remains the same.
Thanks.