Check version Asterisk and it show UNKNOWN

hello every one!
I build Asterisk 18. when it done I check the version of asterisk in CLI, I notice it is showing Asterisk UNKNOW and not Asterisk 18.4.0 as I would like.
I’m trying to fix this problem so it can show the correct version, but really my current problem is i don’t know where to fix it.
hope anyone can give me some advice, thanks a lot

[root@syuu-test-park ~]# asterisk -rvvvvv
Asterisk UNKNOWN__and_probably_unsupported, Copyright (C) 1999 - 2021, Sangoma Technologies Corporation and others.
Created by Mark Spencer <>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
Connected to Asterisk UNKNOWN__and_probably_unsupported currently running on syuu-test-park (pid = 22419)
syuu-test-park*CLI> core show version
Asterisk UNKNOWN__and_probably_unsupported built by root @ cent73-asterisk18build on a x86_64 running Linux on 2021-08-12 09:04:41 UTC

How have you downloaded Asterisk? Are you building an RPM?

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