The thing is that in real life, VOBL does exist, as does VOBG. Both near Bangalore, VOBL to the south, and VOBG to the north. So they are both existing airports, only not in any sim (not in MSFS, but also not in XP)
I think it's best to re-route the Event to VOBG, and avoid these issues alltogether. (Which I actually now see as the consensus, and marked "done" in one of the management board threads; and on the site, admin, maintain events, there is VOBG as well. Maybe we need to re assign the Event to the contestants to get their leg lists updated, or work some behind-the-scenes database magic).