Primary DC schema Owner is deleted

I'm running a Windows 2003 PDC and I'm getting random netlogon event ID 5719 errors. I've run dcdiag and received the following:

Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\Documents and Settings\******>dcdiag

Domain Controller Diagnosis

Performing initial setup:
   Done gathering initial info.

Doing initial required tests

   Testing server: Default-First-Site-Name\RSLCO2-PRIMARY
      Starting test: Connectivity
         ......................... RSLCO2-PRIMARY passed test Connectivity

Doing primary tests

   Testing server: Default-First-Site-Name\RSLCO2-PRIMARY
      Starting test: Replications
         ......................... RSLCO2-PRIMARY passed test Replications
      Starting test: NCSecDesc
         ......................... RSLCO2-PRIMARY passed test NCSecDesc
      Starting test: NetLogons
         ......................... RSLCO2-PRIMARY passed test NetLogons
      Starting test: Advertising
         ......................... RSLCO2-PRIMARY passed test Advertising
      Starting test: KnowsOfRoleHolders
         Warning: CN=NTDS Settings\0ADEL:368262e3-4f8f-4fbe-8834-2a6cb92260cc,CN
=RSLCO2PRIMARY\0ADEL:dbe162e6-9408-4c13-aa64-59b49cbd3ece,CN=Servers,CN=Default-
First-Site-Name,CN=Sites,CN=Configuration,DC=JPATS is the Schema Owner, but is d
eleted.
         ......................... RSLCO2-PRIMARY failed test KnowsOfRoleHolders

      Starting test: RidManager
         ......................... RSLCO2-PRIMARY passed test RidManager
      Starting test: MachineAccount
         ......................... RSLCO2-PRIMARY passed test MachineAccount
      Starting test: Services
         ......................... RSLCO2-PRIMARY passed test Services
      Starting test: ObjectsReplicated
         ......................... RSLCO2-PRIMARY passed test ObjectsReplicated
      Starting test: frssysvol
         ......................... RSLCO2-PRIMARY passed test frssysvol
      Starting test: frsevent
         ......................... RSLCO2-PRIMARY passed test frsevent
      Starting test: kccevent
         ......................... RSLCO2-PRIMARY passed test kccevent
      Starting test: systemlog
         An Error Event occured.  EventID: 0x00000014
            Time Generated: 03/31/2010   09:34:34
            (Event String could not be retrieved)
         ......................... RSLCO2-PRIMARY failed test systemlog
      Starting test: VerifyReferences
         ......................... RSLCO2-PRIMARY passed test VerifyReferences

   Running partition tests on : ForestDnsZones
      Starting test: CrossRefValidation
         ......................... ForestDnsZones passed test CrossRefValidation

      Starting test: CheckSDRefDom
         ......................... ForestDnsZones passed test CheckSDRefDom

   Running partition tests on : DomainDnsZones
      Starting test: CrossRefValidation
         ......................... DomainDnsZones passed test CrossRefValidation

      Starting test: CheckSDRefDom
         ......................... DomainDnsZones passed test CheckSDRefDom

   Running partition tests on : Schema
      Starting test: CrossRefValidation
         ......................... Schema passed test CrossRefValidation
      Starting test: CheckSDRefDom
         ......................... Schema passed test CheckSDRefDom

   Running partition tests on : Configuration
      Starting test: CrossRefValidation
         ......................... Configuration passed test CrossRefValidation
      Starting test: CheckSDRefDom
         ......................... Configuration passed test CheckSDRefDom

   Running partition tests on : JPATS
      Starting test: CrossRefValidation
         ......................... JPATS passed test CrossRefValidation
      Starting test: CheckSDRefDom
         ......................... JPATS passed test CheckSDRefDom

   Running enterprise tests on : JPATS
      Starting test: Intersite
         ......................... JPATS passed test Intersite
      Starting test: FsmoCheck
         ......................... JPATS passed test FsmoCheck

I'm at a loss as to why this would just appear for no apparent reason. I've retraced my steps and have found NO significant changes that have been made since this error began appearing in event viewer.