Is fixt a word in Scrabble?

Excuse me, I have a quick question regarding Scrabble vocabulary. I was wondering, does the word 'fixt' actually exist in the Scrabble dictionary? I've never come across it before, and I'm always keen to expand my knowledge of the game. Could you please clarify whether it's a legitimate word that can be played on the Scrabble board? Thank you in advance for your help with this inquiry.