What is the reason for duplicate entry in sys.props$ and how to delete it?

Hi,
Please Advice

What is the reason for duplicate entry in sys.props$ and how to delete it?

select name,value$ from sys.props$ where name like '%TABLESPACE%'

NAME VALUE$
------------------------------ ------------
DEFAULT_TEMP_TABLESPACE TEMP
DEFAULT_PERMANENT_TABLESPACE USERS
DEFAULT_TEMP_TABLESPACE SYSTEM
DEFAULT_PERMANENT_TABLESPACE SYSTEM

Regards,
Ola