How to fix the Oracle error ORA-28345: cannot downgrade because there exists encrypted column?

In this post, you’ll learn more about the Oracle ErrorORA-28345: cannot downgrade because there exists encrypted column with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28345: cannot downgrade because there exists encrypted column

Reason for the Error ORA-28345: cannot downgrade because there exists encrypted column

An attempt was made to downgrade when there was an encrypted column in the system.

How to fix the Error ORA-28345: cannot downgrade because there exists encrypted column ?

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

Decrypt these columns before attempting to downgrade.