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Continue to ChatUpgrade failure (11.2.0.4 to 19c) followed by ORA-29702: error occurred in Cluster Group Service operation & ORA-00704, ORA-00604 and ORA-00904 https://thehelpfuldba.com/upgrade-failure-11-2-0-4-to-19c-followed-by-ora-29702-error-occurred-in-cluster-group-service-operation/