Man I’m dying to know what yours is, but for privacy its probably best not to put it publicly.
My guess is that you cannot change it. It is the actual serial number so when you call in to support they can correctly identify you. Just like some products have serial numbers such as AB12345CD, FL printers follow the format of AdjectiveNoun. If anything, FL support may be able to change it to another AdjectiveNoun combo, but I wouldn’t count on it. Certainly not to Printer #1 or anything generic like that.