Duplicate entries for '/export/home' appear in 'etc/selinux/targeted/contexts/files/file_contexts.homedirs' file, with associated errors in 'messages' log

Issue

When the HOME=/export/home directive is set in the /etc/default/useradd file, to define the default home directory location for new users, and /export/home exists on the filesystem, a run of the genhomedircon command results in duplicate SELinux context templates being created for /export/home in the /etc/selinux/targeted/contexts/files/file_contexts.homedirs file.

The existence of these duplicate entries lead to error messages as given below, to appear in the messages log file, on any process involving the use of the /etc/selinux/targeted/contexts/files/file_contexts.homedirs file.

Mar 20 16:20:57 localhost restorecon:
/etc/selinux/targeted/contexts/files/file_contexts: Multiple same
specifications for /export/home/[^/]*/.+. 
Mar 20 16:20:57 localhost restorecon:
/etc/selinux/targeted/contexts/files/file_contexts: Multiple same
specifications for /export/home/[^/]*/.virtinst(/.*)?. 
....

Mar 20 16:27:46 localhost lvm[20599]:
/etc/selinux/targeted/contexts/files/file_contexts: Multiple same
specifications for /export/home/[^/]*/.+. 
Mar 20 16:27:46 localhost lvm[20599]:
/etc/selinux/targeted/contexts/files/file_contexts: Multiple same
specifications for /export/home/[^/]*/.virtinst(/.*)?. 
....