How to fix the Oracle error ORA-15266: user identification number ‘string’ is not allowed?

In this post, you’ll learn more about the Oracle ErrorORA-15266: user identification number ‘string’ is not allowed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15266: user identification number ‘string’ is not allowed

Reason for the Error ORA-15266: user identification number ‘string’ is not allowed

This user identification number is used internally by ASM.

How to fix the Error ORA-15266: user identification number ‘string’ is not allowed ?

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

Please choose a different user identification number.