High progesterone Day 21 blood test??

I just got back my results for my day 21 bloodwork, and it had a little symbol I haven’t seen before so when I went to it it had “HI” in bold

It was 74.9 nmol/L

Is that a good sign??? What does this mean?

My levels are always normal. I’ve been having cycle monitoring done the past 6 cycles, all normal.