How to fix the Oracle error PGU-00391: value string is defined to string; legal values: string or string?

In this post, you’ll learn more about the Oracle ErrorPGU-00391: value string is defined to string; legal values: string or string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGU-00391: value string is defined to string; legal values: string or string

Reason for the Error PGU-00391: value string is defined to string; legal values: string or string

Cause: The PGAU mode has been incorrectly defined.

How to fix the Error PGU-00391: value string is defined to string; legal values: string or string ?

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

Action: Define the value of the variable as one of the legal values.