Hello Sandeep,
See: 2078425 - Troubleshooting note for SAP HANA platform lifecycle management tool hdblcm
Point 4 will direct you to two other sections, "Repairing installations with missing signature" and "How to prepare SAP HANA packages for installation or update", these will allow you to resolve this issue and also hopefully ensure you do not encounter it again.
Regards,
Michael