ORA-01920: user name ‘string’ conflicts with another user or role name

I got ” ORA-01920: user name ‘string’ conflicts with another user or role name ”  error in Oracle database.

ORA-01920: user name ‘string’ conflicts with another user or role name

Details of error are as follows.

ORA-01920: user name 'string' conflicts with another user or role name

Cause: There is already a user or role with that name.

Action: Specify a different user name.

user name ‘string’ conflicts with another user or role name

This ORA-01920 error is related to attempt creating a user that already exists or attempting to assign a role that has already been assigned.

To solve this error, Specify a different user name.

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