Getting an error "No suitable key found for reloading" for SAP HANA target system

Hello,

I am using One Identity version 8.1.3. I have used Native database connector to connect to SAP HANA database and had to declare primary key for SYS.Users schema in SAP HANA database. I could uccessfully establish the connectivity and could create the synchronization project but when I try to browse the target system, it throws above mentioned error for SYS.USERS schema. Can someone please help? Thank you