According to Tim Bailey (as he's popping the spurs off one of my males), spurs are really just layers upon layers of shed that build up to make the spur larger. They do "grow" back over time with future sheds.
He's popping them off my male going "I bet you didn't know that spurs are just layers of shed". And I'm going, my poor boy!!!!! LOL
In any case, to the OP - it's no big deal or any detriment to your snake. This same boy went on to successfully father a clutch a few months later with no "visible" spurs. This also further proves that you can't sex a snake based on the size of their spurs.