How to fix the Oracle error ORA-09929: GLB of two labels is invalid?

In this post, you’ll learn more about the Oracle ErrorORA-09929: GLB of two labels is invalid with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-09929: GLB of two labels is invalid

Reason for the Error ORA-09929: GLB of two labels is invalid

The result of a greatest lower bound operation on two labels was not valid.

How to fix the Error ORA-09929: GLB of two labels is invalid ?

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

Repeat the operation with two different labels. Consult the system encoding file for the values of valid labels.