Conversion from CentOS 7 to OpenVZ 7 fails: Transaction check error: package nss-softokn-freebl-3.53.1-6.el7_9.x86_64 (which is newer than nss-softokn-freebl-3.44.0-8.vl7.i686) is already installed

Symptoms 

Conversion from CentOS 7 to OpenVZ 7 fails:

CONFIG_TEXT: Transaction check error: package nss-softokn-freebl-3.53.1-6.el7_9.x86_64 (which is newer than nss-softokn-freebl-3.44.0-8.vl7.i686) is already installed

Cause

System packages version mismatch.

Resolution

1. Connect to OpenVZ 7 node via SSH
2. Remove the nss-softokn-freebl and all the related packages from RPM database:

   # rpm -e --nodeps --justdb nspr
   # rpm -e --nodeps --justdb nss
   # rpm -e --nodeps --justdb nss-pem
   # rpm -e --nodeps --justdb nss-softokn
   # rpm -e --nodeps --justdb nss-softokn-freebl
   # rpm -e --nodeps --justdb nss-sysinit
   # rpm -e --nodeps --justdb nss-tools
   # rpm -e --nodeps --justdb nss-util

3. Install the packages back from virtuozzo repos:

   # yum localinstall http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/n/nss-3.44.0-7.vl7.x86_64.rpm
   # yum localinstall http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/n/nss-softokn-freebl-3.44.0-8.vl7.i686.rpm
   # yum localinstall http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/n/nss-tools-3.44.0-7.vl7.x86_64.rpm