How to fix the Oracle error ORA-15256: user ‘string’ is already a member of user group ‘string’?

In this post, you’ll learn more about the Oracle ErrorORA-15256: user ‘string’ is already a member of user group ‘string’ with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15256: user ‘string’ is already a member of user group ‘string’

Reason for the Error ORA-15256: user ‘string’ is already a member of user group ‘string’

The specified user was already a member of the specified user group.

How to fix the Error ORA-15256: user ‘string’ is already a member of user group ‘string’ ?

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

Specify either an alternate user or an alternate user group.