Hi Niyati,
SYSTEM user has not given you rights to create repository so you are facing this issue, Ask appropriate rights from your SYSTEM user.
He can either execute below statement
GRANT REPO.EDIT_IMPORTED_OBJECTS ON "'afl.falcon'" TO lui;
or
he can go to Security-> Users under Package Privilege add Root package then on right side he can assign the roles.
**** Also Add Repository_Rest procedure under Object Privilege tab
Regi id by default included in latest versions of HANA Studio. No need to map it manually
Thanks
Bhupender