How to fix the Oracle error PRCD-01235: Unable to downgrade configuration of single instance database {0} to version {1}?

In this post, you’ll learn more about the Oracle ErrorPRCD-01235: Unable to downgrade configuration of single instance database {0} to version {1} with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PRCD-01235: Unable to downgrade configuration of single instance database {0} to version {1}

Reason for the Error PRCD-01235: Unable to downgrade configuration of single instance database {0} to version {1}

Cause: Single instance database was specified.

How to fix the Error PRCD-01235: Unable to downgrade configuration of single instance database {0} to version {1} ?

You can fix this error in Oracle by following the below steps

Action: Remove the single instance database configuration. 11.2 Clusterware cannot manage pre-11.2 single instance databases.