Upgrade to AP before trip, lose FP?

[DisneyHomework]

sorry cant find this anywhere. Have a December trip and I realize I can upgrade on property, however my FP booking window for February trip opens prior to that trip. I purchased direct thru MDE. If I call to upgrade will it impact my December fast pass reservations? Preserving them is my priority over February, but ideally would like to book Feb at the opening of my window if there’s no impact.

Thanks!

 

[Robo]

sorry cant find this anywhere. Have a December trip and I realize I can upgrade on property, however my FP booking window for February trip opens prior to that trip. I purchased direct thru MDE. If I call to upgrade will it impact my December fast pass reservations? Preserving them is my priority over February, but ideally would like to book Feb at the opening of my window if there’s no impact.

Thanks!

Changing a type of ticket won’t change booked FP+