Error
Error Code: ORA-28290

Oracle Error ORA-28290: Duplicate Kerberos Principal

📦 Oracle Database
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Description

The ORA-28290 error occurs in Oracle Database when multiple user entries are configured with the same Kerberos principal name (krbPrincipalName). This violates the uniqueness constraint for Kerberos authentication.
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Error Message

ORA-28290: Multiple entries found for the same Kerberos Principal Name
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Known Causes

3 known causes
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Duplicate User Configuration
Multiple enterprise users have been incorrectly configured with the same Kerberos principal name in the LDAP directory.
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LDAP Provisioning Error
Incorrect provisioning scripts or manual LDAP modifications have resulted in duplicate krbPrincipalName values.
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Synchronization Issues
Synchronization between the database and LDAP directory fails to correctly update or remove krbPrincipalName when users are modified or deleted.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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