Error "Not downgrading package kernel" when updating kernel modules

Software SW bugs discussion
1

I installed the firmware using the 6-LEDs method.
After restart, when trying to update kernel modues I get this error:

Upgrading kmod-br-netfilter on root from 5.15.148-1-cfaf0eaef6d040cba91b2530b83dd2ac to 5.15.148-1-f107ab883b9ff1076967eb64dab57050...
Downloading https://repo.turris.cz/hbl/omnia/packages/core/kmod-br-netfilter_5.15.148-1-f107ab883b9ff1076967eb64dab57050_arm_cortex-a9_vfpv3-d16.ipk
Not downgrading package kernel on root from 5.15.156-1-e632aba4a8fdf4bf6318e00dfbddbf3c to 5.15.148-1-f107ab883b9ff1076967eb64dab57050.
2

It appears from the log that you are currently using the hbl branch. Thank you for your participation in testing. We have recently reverted a kernel update due to issues experienced by some devices after the upgrade process, and we are currently investigating the root cause. The updater cannot downgrade packages. The recommended solution is to switch to the hbk branch temporarily and then switch back to the hbl branch.

3

It didn’t work. Switching branches doesn’t seem to replace the kernel.

4

I reinstalled mtd firmware and then I did a 6-LED reset again. That fixed it, but I lost the config.