Worried about name mismatch on Lufthansa booking

I’m flying from India to Europe on Lufthansa and I’m a bit stressed about my name on the ticket.

My passport doesn’t have a last name. Because of that, my frequent flyer profile ended up weird, and the booking now shows my name as:

First name: ABCD

Last name: ABCDEF

There’s no middle name on the ticket. On my passport, my name is basically just ABCD, and I usually combine my first name and last name as ABCDEF when booking.

Has anyone flown Lufthansa with a similar no-last-name situation? Do they usually make a fuss about this, or am I overthinking it?