What does Acts 1:17 mean?

All these with one accord continued steadfastly in prayer and supplication, along with the women, and Mary the mother of Jesus, and with his brothers.

In these days, Peter stood up in the middle of the disciples (and the number of names was about one hundred twenty), and said,

“Brothers, it was necessary that this Scripture should be fulfilled, which the Holy Spirit spoke before by the mouth of David concerning Judas, who was guide to those who took Jesus.

Now this man obtained a field with the reward for his wickedness, and falling headlong, his body burst open, and all his intestines gushed out.

It became known to everyone who lived in Jerusalem that in their language that field was called ‘Akeldama,’ that is, ‘The field of blood.’

For it is written in the book of Psalms, ‘Let his habitation be made desolate. Let no one dwell therein;’ and, ‘Let another take his office.’