The logs are useless.

All I get is this:

namconfig: Executing command: ruby /opt/novell/migration/sbin/serveridswap/scripts/repair/nam-grpmod.rb -H servername --check -a cn=admin,o=abc --grp cn=admingroup,o=abc

Lum Repair:information: checking LUM enabling for group: admingroup.
Lum Repair:information: checking LUM enabling for user: admin.
Lum Repair:id: admin: No such user
Lum Repair:Fatal: Failed to LUM enable user: admin.
Lum Repair: Fatal: command id "admin" : failed with error .

ServerIDSwap:namconfig:LUM enabling failed for group, cn=admingroup,o=abc re-run the repair step

You can rerun it many times and it fails every time.