can someone give me a confirmation for this?

i was just browsing a star&planet catalogue app i have, and noticed something peculiar: TRAPPIST-1's surface temperature is listed as 2745 K:

now, normally this would be fine, however all other sources say its temperature is 2556 K (usually rounded to 2550), something which i know off the top of my head (like the sun's 5778 K).
the app claims it uses the latest available data of planets and stars, and i did check that the temperature is in K (cause Kelvin master race)
so yeah, is the 2745 K true or do we stick to the currently accepted 2556 K?