Error when migrating a cpanel backup

I get an error, that gives 0 results when I search for even the truncated version in google. I am trying to migrate a cpanel backup(that contains the main reseller account) and the error I get is
“validation failed : Could not find mail aliases file for in backup”

How can I get past this, I’ve been generating new backups every month and retrying. So it’s not an issue of curruption, and in fact the cpanel I am migrating is on the same physical machine in it’s own openvz vps. Is there a way to force this to continue.