insufficient privilege: Cannot grant activated roles

Hi Experts,

I am trying to assign role "sap.hana.xs.admin.roles::HTTPDestViewer" to user SREEHARI from SYSTEM user. But I am getting the following error message .

Could not execute 'GRANT "sap.hana.xs.admin.roles::HTTPDestViewer" TO SREEHARI'

  SAP DBTech JDBC: [258] (at 6): insufficient privilege: Cannot grant activated roles:

SQL : GRANT sap.hana.xs.admin.roles::HTTPDestViewer TO SREEHARI;  

Looks like SYSTEM is not having the authorizations to assign the role to SREEHARI.

Please Help.

Sreehari