What were you trying to do that didn't work?
-smp 8,sockets=2,dies=1,clusters=1,cores=4,threads=1 \
qemu-kvm: warning: Deprecated CPU topology (considered invalid): Unsupported clusters parameter mustn't be specified as 1

There is an upstream bug opened on https://gitlab.com/qemu-project/qemu/-/issues/2420.
commit 9d7950edb0cdf8f4e5746e220e6e8a9e713bad16
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Mon May 13 13:33:57 2024 +0100

hw/core: allow parameter=1 for SMP topology on any machine

Please provide the package NVR for which bug is seen:
qemu-kvm-9.0.0-7.el9.x86_64

How reproducible:
100%

Steps to reproduce
1. In guest SMP topology, set clusters=1
qemu-kvm: warning: Deprecated CPU topology (considered invalid): Unsupported clusters parameter mustn't be specified as 1

Expected results
Cluster can set to 1

Actual results
Cluster can't set to 1.