Snapshot backup not supported on a tenant database

I use suse for sap 12 sp3,install SAP HANA 2.0, when i execute command "BACKUP DATA FOR FULL SYSTEM CREATE SNAPSHOT COMMENT 'SNAPSHOT-2018-09-20';" in eclipse sql console,I got an error "SAP DBTech JDBC: [7]: feature not supported: Snapshot backup not supported on a tenant database", please help me,thanks a lot