void invalidate_external_fw(nrf_dfu_flash_callback_t callback)
{
    ret_code_t err_code;
    static nrf_dfu_settings_t dfu_settings_buffer;

    nrf_dfu_bank_invalidate(&s_dfu_settings.bank_1);


    s_dfu_settings.crc = settings_crc_get(&s_dfu_settings);
    s_dfu_settings.boot_validation_crc = boot_validation_crc(&s_dfu_settings);
    err_code = nrf_dfu_flash_erase((uint32_t)m_dfu_settings_buffer, 1, NULL);



    if(err_code == NRF_SUCCESS)
    {
        // Do nothing
    }
    else
    {
        NRF_LOG_ERROR("Failed to erase m_dfu_settings_buffer", err_code);
    }

    memcpy(&dfu_settings_buffer, &s_dfu_settings, sizeof(nrf_dfu_settings_t));

    err_code = nrf_dfu_flash_store((uint32_t)m_dfu_settings_buffer,
                                   &s_dfu_settings,
                                   sizeof(nrf_dfu_settings_t),
                                   NULL);


    nrf_dfu_settings_backup(callback);


    if(err_code == NRF_SUCCESS)
    {
        // Do nothing
    }
    else
    {
        NRF_LOG_ERROR("Failed to invalidate external firmware, error: 0x%X", err_code);
    }
    /*NRF_LOG_INFO("Actual bank code value: %d, at address: %p",*/
                 /*((nrf_dfu_settings_t *)m_dfu_settings_buffer)->bank_1.bank_code, (void*)m_dfu_settings_buffer);*/
}