Oracle Solution for Error ora-01535

Solution for Oracle Error ORA-01535

ORA-01535: rollback segment 'string' already exists or given name has prefix _SYSSMU

What triggered the Error:

Specified rollback segment already exists or given name starts with _SYSSMU.

What should we do to fix it:

Use a different name. Note that _SYSSMU is an illegal prefix to an RBU segment.