Why it is showing SYS user twice in dba_users_with_defpwd table after upgraded to 19c. ?

There are two SYS user is showing in dba_users_with_defpwd table. So please tell us what does it means and why it is showing. Please find below output.

select * from dba_users_with_defpwd;

USERNAME        PRODUCT

-------------------- ------------------------------

SYS

OUTLN

SYS          Oracle Hospitality Simphony

ORACLE_OCM

LBACSYS