Here's a Latitude FP question.

The flight I want to take tomorrow is J0 Y5.

There's a later flight that's J2 Y9.

If I book the later flight, then do the complimentary upgrade, then have the concierge move me to the earlier flight, will I be booked on it as "revenue J seated in economy" top of the list? Or will I have to request an eUpgrade?

I know for a true J ticket (or even a J flight pass), I'd be at the top of the list, so I'm curious how it works for a Latitude FP.

I've never wanted to get on a J0 flight before with a Latitude FP.