Did your cat only high spray once or it is becoming a habit?
If your cat is normally a squatter, but it peed high, then you have to see if it happens again. If it was just that one time, then it might have been an accident or maybe your cat is protesting.
Can I teach my cat to stop peeing high?
If your cat has always been a high-sprayer, then you should probably get a litterbox that accommodates its habits instead of trying to change its urination process.