Welcome back.
This message means that somewhere in your environment there's a servicePrincipalName (SPN) that is conflicting with the ones that are being registered by your system.
What to do:
a) Read about SPNs and Centrify here: https://community.centrify.com/t5/Centrify-Infrastructure-Services/FAQ-Centrify-DirectControl-and-servicePrincipalNames-SPNs/td-p/22121
b) With the knowledge from (a) now you can pinpoint what's the offending system, determine if it's still needed and or make a decision to rename the new system.
R.P