Event 11 The KDC encountered duplicate names while processing a Kerberos authentication request. (of type KEY ID)

I have recently migrated a Windows 2012 R2 DC to Windows Server 2016. Afterwards I started noticing series of this particular error.

Log Name:      System

Source:        Microsoft-Windows-Kerberos-Key-Distribution-Center

Date:          11/27/2018 9:24:24 AM

Event ID:      11

Task Category: None

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      BBL-DC-CDC01.bd.bracbank.com

Description:

The KDC encountered duplicate names while processing a Kerberos authentication request. The duplicate name is D5B2E9E1E8C74C45D7F939E93ED09C7B0315FE69EE06D2F2458E0A050E453763 (of type KEY ID). This may result in authentication failures or downgrades to NTLM. In order to prevent this from occurring remove the duplicate entries for D5B2E9E1E8C74C45D7F939E93ED09C7B0315FE69EE06D2F2458E0A050E453763 in Active Directory.

Event Xml:

<Event xmlns="">

  <System>

    <Provider Name="Microsoft-Windows-Kerberos-Key-Distribution-Center" Guid="{3FD9DA1A-5A54-46C5-9A26-9BD7C0685056}" EventSourceName="KDC" />

    <EventID Qualifiers="49152">11</EventID>

    <Version>0</Version>

    <Level>2</Level>

    <Task>0</Task>

    <Opcode>0</Opcode>

    <Keywords>0x80000000000000</Keywords>

    <TimeCreated SystemTime="2018-11-27T03:24:24.310757900Z" />

    <EventRecordID>3984</EventRecordID>

    <Correlation />

    <Execution ProcessID="0" ThreadID="0" />

    <Channel>System</Channel>

    <Computer>BBL-DC-CDC01.bd.bracbank.com</Computer>

    <Security />

  </System>

  <EventData>

    <Data Name="Name">D5B2E9E1E8C74C45D7F939E93ED09C7B0315FE69EE06D2F2458E0A050E453763</Data>

    <Data Name="Type">KEY ID</Data>

    <Binary>

    </Binary>

  </EventData>

</Event>

I have been struggling with this error for the last few days. Even though Event 11 is a very common error and there are clear instructions on how to mitigate the error, they fail to address my specific scenario.

All the solutions I got so far is related to "Type DS_SERVICE_PRINCIPAL_NAME" but mine is "Type KEY ID ". Basically this error says that KDC encountered duplicate names and then spits out a large string of hexadecimal no. rather than producing which SPN is duplicated. Therefore, it's difficult to solve the issue with "setspn" cmdlet.

I'm an amateur when it comes to Windows Server Active Directory, so any help is highly appreciated. Thanks.