Failed to rebuild autoinstall ISO for freebsd-14.4 and FreeBSD 15.1 with error: Failed adding duplicate name to parent

Hi,

I have reported this PR 1 year ago.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287251: Failed to rebuild
autoinstall ISO for freebsd-14.4 and FreeBSD 15.1 with error: Failed adding
duplicate name to parent

However, there has been no progress yet.

And Michael Osipov <[email protected]> suggested to raise this issue
here in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287251#c24.
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Unfortunately, I am not capable because I don't know how the process
works. I think it would make sense the raise the issue on hackers@ or
current@ mailing lists.

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Would you please take a look and help to fix this issue?

Thank you!
Yanhui