Duplicate SPN issue: not sure how to resolve..

Have a duplicate SPN situation that I'm wondering about.
Environment: Windows domain: single forest, 3 DC's
Mix of svr 2008/2012
There are numerous event log entries on mutiple servers that say:
A Kerberos Error Message was received:
 on logon session
 Client Time:
 Server Time: 5:45:15.0000 4/6/2018 Z
 Extended Error: 0xc0000035 KLIN(0)
 Client Realm:
 Client Name:
 Server Name: MSSQLSvc/sql1.butlerbrosis.local:1433
 Target Name: MSSQLSvc/sql1.butlerbrosis.local:1433@BUTLERBROSIS.LOCAL
 Error Text:
 File: 9
 Line: f0a
Error Data is in record data.

I'm reading this article, but I'm still not sure if/which SPN I should consider  deleting.
Here's the output of 2 SETSPN commands:

Thanks much for looking!
Richard GouetteIT ManagerAsked:
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it-app do not have any issues as far as I see
from another snap, i believe you don't have sql service running with administrator account, do you?

hence go to administrator account properties and check for service principal name attribute, within that u will find entry in snapshot, delete that dntry

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Shaun VermaakTechnical SpecialistCommented:
Running multiple instances on SQL1?
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