RHN Systemid random mismatch using Spacewalk

[Siro]

Hi all,
i have a silly problem with systemid of some centos 7.
I using Ansible for setup machines, included registration to internal spacewalk server, but randomly on the machine i lose the sincronizzation with rhn channels.
After a surf on internet i found that systemid change and the client have a values higher than the server (creating the mismatch) but i don't understand why infact when i re-run my playbook in ansible for some reasons the rhn registration is done again and i doubt is that the reason.
In some scenario i see servers show this problem after some day without touch them.
What can change my systemid on servers?
Thanks for your time.
Siro.

[wicked]

I'm having the same issue after upgrading to spacewalk 2.8. Did you find any solution to this problem?