No this is not an error. The desert locusts Wikipedia says the locusts can fly 100km a day. June is four months away so that's plenty of time.

https://en.m.wikipedia.org/wiki/Desert_locust

Looks like they're currently in Ethiopia (NE Africa) so India seems correct.

Looks like they rarely fly over water though: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1626356/

At 150 kilometers per day, they could cover the 3,500 km between Egypt and India in 20 days. Of course they're not covering that much distance every day, but they can jump between distant sources of food very quickly, so smaller gaps between crops or across deserts won't stop them.

There was a horrendous locust swarms few months ago in Punjab already before the winter.

The same megaswarm was in Saudi Arabia a year ago.

It seems that the swarm has since split, with one swarm going back to Africa

apparently they can move 90 MILES a day. I guess if they have food and no predators they can move and take over.

At 150km a day, seems possible.

Or maybe they decide to go to Europe?