What does Deuteronomy 17:12 mean?

If someone acts arrogantly and refuses to listen to the priest or the judge who serves there, that person must be put to death. You have to get rid of this kind of arrogance in Israel. Deuteronomy 17:12 - Modern Text Bible

(Defying the highest court is seen as a threat to the whole community's order and trust in God. The punishment is meant to protect everyone.)