I have magic bands from our last trip and we are going now again and they sent me an email to order and customize new bands. I thought I could use the old ones. The old ones are linked to my experience site and I could still see the, but for some reason I have to now order new ones.
1- Is it a new set of magic bands per trip?
2- If so, how do I link my ticket which I already have?
1- Yes. You WILL be issued new MB for this trip.
(But, you can still use your current MB on the upcoming trip, if you like.
2- It doesn't matter which bands you use, new or old. Why?
There is no reservation info, or ticket info, or credit card info,
or FP+ info "put onto" a MagicBand.
The MagicBands just contain a unique serial number that is used
to access the information that is stored in your MyDisneyExperience computer file.
So, even if you were to lose a MagicBand, the info stays locked in your file.
Disney can just set up a new band (different serial number)
to access the info in your
MDE file.
The MagicBand works like the combination to a locked safe, a key to a locked door.
The MB, itself, is not the file of info or the container of the info.
The MB just unlocks the file of info to be read, when needed.