You will get a new visa. Not an issue there. If i were you i would postpone and stay back.
https://www.businesstoday.in/sectors/aviation/coronavirus-outbreak-india-bans-international-flights-for-a-week-from-march-22/story/398709.html
"No commercial aircraft shall land in India after midnight falling between March 21 and March 22 till midnight falling between March 28 and March 29," Lav Agarwal, Joint Secretary, Ministry of Health and Family Welfare, said at a press conference.
https://www.businesstoday.in/sectors/aviation/coronavirus-outbreak-india-bans-international-flights-for-a-week-from-march-22/story/398709.html
"No commercial aircraft shall land in India after midnight falling between March 21 and March 22 till midnight falling between March 28 and March 29," Lav Agarwal, Joint Secretary, Ministry of Health and Family Welfare, said at a press conference.