Tag Archives: ORA-15166

ORA-15166: cluster in rolling downgrade from version [string] to [string]

oracle

ORA-15166: cluster in rolling downgrade from version [string] to [string]
Cause: The current software version of the instance was
incompatible with the rolling downgrade operation of the cluster.
Action: The version number of new member instance must be one of the two versions involved in the rolling downgrade.

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