LEAPP Upgrade failed with more space needed on the / filesystem

LEAPP Upgrade from RHEL 7 to 8 fails for lack of space, The actual error while performing a LEAPP upgrade.

Disk Requirements:
   At least 1342MB more space needed on the / filesystem.

Just we need to increase the size of OVAL Size using variable.

export LEAPP_OVL_SIZE=4096

This resolves the LEAPP upgrade error which need more space.