Hi Ashwini,
I think you are internal to SAP, I am sure you'll get better and faster response on your internal forums. May be somebody can take a look at your HANA system and check if the repository has been modified or not.
Sometimes such issue may occur due to mismatching versions of Studio and HANA database. But it used to happen in the past. Can you please confirm your Studio and HANA revisions ?
Ravi