+1!
Usually, it's a 61.00 average to become promoted to Legend. Alas, you won a whopping 72 cr for 2nd place in a tournament - my congrats! - and this apparently did the trick.
Promotion may have come while you were playing that last 31 on STA, making this score your first Legend score and average though it's shown as a TM score.
New threshold for promotion to Tour Legend is 60.000. If you ever want to know how close you come to saturation (500 rounds), make a note NOW of your current total ranked rounds number from your stats.
And, please, forget about +-Par when it comes to average - the score counts, nine hole 31 doubled to 62.