Error in Insert SQL statement in SAP hana Studio

Dear All,

           I am trying to insert entry in the Table which i created. I am wrinting below code for insert: in the SAP hana studio.

insert into "SYSTEM"."STUDENT" values ('001','nujhat','jamadar','20121112')

But I amgetting belowerrorwhen i execute.Please let me knowhow do i proceed.

Index(_SYS_TREE_RS_#147125_#0_#PO).