It’s not the first time you have used the Digi card. 28/12/18 shows 118, 29/12 is 119 and today 120. That’s how many times the card has been inserted into a tachometer head.
You have got an overspeed at 12.40 on the 28th and a power interruption on the 24th, both with the same DB number.
On the 28/12/18, you were just in the 4h30 by one minute at 16.16.