[Pkg-libvirt-maintainers] Bug#945400: spice port conflict - multiple vms want Port 5900

[ermac god]

Package: libvirt-daemon-system
Version: 5.0.0-4
Severity: normal

Hello on Debian buster amd64 (4.19.67-2+deb10u2 (2019-11-11)) if start 
multiple vms spice port 5900 on diverse ip want start same a bug previously 
#863266

root at server:~# virsh start vm1 
Domain vm1 started

root at server:~# virsh start vm2  
error: Failed to start domain vm2 
error: internal error: Failed to reserve port 5900

configuration file of vm1
<graphics type='spice' port='5900' autoport='no' listen='127.168.0.1'>
  <listen type='address' address='127.168.0.1'/>
</graphics>

configuration file of vm2
<graphics type='spice' port='5900' autoport='no' listen='127.168.0.2'>
  <listen type='address' address='127.168.0.2'/>
</graphics>