I just conversed with Lufthansa on client care number (0008000501618). They asked me hang tight for up to 14 days as my flight is planned on eighteenth of May and the standards may change in impending days.
Aside from that, they gave me 3 alternatives for my booking:
1. They’ll discount the leftover sum subsequent to deducting 190 Euros.
2. The total sum can be changed over to vouchers which can be used before the current year’s over.
3. The flight can be rescheduled till seventeenth of May which will be liberated from cost on the off chance that I decide to book for same class, same course and same objective (economy class for my case).