[Spacewalk-list] various error messages in logs: rhnServer/server_certificate.certificate('ERROR', "Could not marshall certificate for

[Thomas Schweikle]

 rhnServer/server_certificate.certificate('ERROR', "Could not marshall
certificate for {'username': None, 'operating_system':
'redhat-release-server', 'description': 'Initial Registration
Parameters:\\r\\nOS: redhat-release-server\\r\\nRelease:
7Server\\r\\nCPU Arch: x86_64', 'checksum':
'da34a746954b4c055ffacac0e02f4507959b495a53b91c8df3629865c7649247',
'profile_name': 'client-dns-name', 'system_id': 'ID-1000010886',
'architecture': 'x86_64-redhat-linux', 'os_release': '7.4', 'fields':
['system_id', 'os_release', 'operating_system', 'architecture',
'type'], 'type': 'REAL'}")

after upgrading from 2.6 to 2.7. Any idea how to get rid of them?

-- 
Thomas