Comment 8 for bug 1999827

I analyzed a bit more, reverse is not the thing.

actually mappings Subnet has already modified values.

keep researching..

{
  <Domain: name=maas>:
    defaultdict(<class 'maasserver.models.staticipaddress.HostnameIPMapping'>,
    {
      'node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.100'}, 4, None, None),
      'ens4f0.node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.51'}, 4, None, 1)
    }),
  <Subnet: 10.0.0.0/24:10.0.0.0/24(vid=0)>:
    defaultdict(<class 'maasserver.models.staticipaddress.HostnameIPMapping'>,
    {
      'node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.100'}, 4, None, None),
      'ens4f0.node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.51'}, 4, None, 1)
    }
  ),
  'reverse':
    defaultdict(<class 'maasserver.models.staticipaddress.HostnameIPMapping'>,
    {
      'node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.100'}, 4, None, None),
      'ens4f0.node-20.maas': HostnameIPMapping('hre8hh', 30, {'10.0.0.51'}, 4, None, 1)
    }
  )
}