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ORA-32794: cannot drop a system-generated sequence


Article ID: 107736


Updated On:


Clarity PPM SaaS Clarity PPM On Premise


When upgrading/ installing a patch/ using Clarity/ we see the error ORA-32794: cannot drop a system-generated sequence


The issue is usually caused by a database customization - identity columns on Oracle database 


Release: Any


To resolve the issue, work closely with your DBA.

  1. Make sure the affected table does not have any custom triggers. If yes, drop them.
  2. Find out whether identity columns are enabled
    select *
    from all_tab_columns
    where identity_column ='YES'
  3. See with the DBA which tables and columns they're associated with and find what other code is manipulating them. (It would probably be some DBA auditing tool or replication tool)
  4. Disable it based on that.

Note: The customizations, identity columns, and database replication tools are unsupported in Clarity.