Upgrade from 8.10 to 9.7 in live mode was processed and it tried to boot to target system. It stops with a  Warning: Can't mount root filesystem .

This problem has been appeared in all partitioning tests where is defined partition /var.

Packages:

 * leapp-0.19.0-3.el8_10.noarch
 * leapp-upgrade-el8toel9-0.22.0-4.el8_10.noarch

Steps to reproduce

1. Process all preupgrade steps 

# leapp upgrade --target 9.7 --enable-experimental-feature livemode --no-rhsm

2. Run 'reboot'

Actual results

See in console.log:

         Starting         
dracut mount hook   
... 
[      
  OK     
] Stopped         
Device-Mapper Multipath Device Controller   
. 
[ 3004.673694] dracut-mount[833]: Warning: Can't mount root filesystem 
         Starting         
Dracut Emergency Shell   
... 
 
Generating "/run/initramfs/rdsosreport.txt" 

Expected results

Upgrade should work