Should I use Bug ID JDK-8239012 or JDK-8234608 for this 14u backport?

[Man Cao]

Hi,

I'm trying to submit a backport to 14u:
https://bugs.openjdk.java.net/browse/JDK-8239012.
The problem is that I initially created JDK-8234608
<https://bugs.openjdk.java.net/browse/JDK-8234608>, and "Fix Version" was
set to 14. When I pushed it to jdk/jdk, the major version has become 15, so
"HG Updates" automatically created JDK-8239012
<https://bugs.openjdk.java.net/browse/JDK-8239012>.
I have closed JDK-8234608 <https://bugs.openjdk.java.net/browse/JDK-8234608> as
a duplicate, but the commit record
<https://hg.openjdk.java.net/jdk/jdk/rev/7ec9c6a6df4f> in JDK-8239012
<https://bugs.openjdk.java.net/browse/JDK-8239012> still shows JDK-8234608.

So the question is, when I push it to 14u, should I keep using JDK-8234608
as the bug ID in the commit message, or can I change it to JDK-8239012?

-Man