How to fix the Oracle error ORA-12496: cannot change existing level, category, or release numbers?

In this post, you’ll learn more about the Oracle ErrorORA-12496: cannot change existing level, category, or release numbers with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12496: cannot change existing level, category, or release numbers

Reason for the Error ORA-12496: cannot change existing level, category, or release numbers

You attempted to change the number assigned to level, category or releasability category.

How to fix the Error ORA-12496: cannot change existing level, category, or release numbers ?

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

Change the character string representations, not the numbers.