bash-3.2#log show /tmp/unifiedlogsv2/unifiedlogs.logarchive
        ==========
    /private/tmp/unifiedlogsv2/unifiedlogs.logarchive
        ==========
    log: Archive format needs updating (to version 3), doing so will render the archive unreadable by older tools.
    Re-run log with --force if you want to allow this upgrade

bash-3.2# log show --force /tmp/unifiedlogsv2/unifiedlogs.logarchive|more
log: warning: The log archive contains partial or missing metadata
log: Could not open log archive: The log archive format is corrupt and cannot be read
==========
/private/tmp/unifiedlogsv2/unifiedlogs.logarchive
==========