What does 1 Kings 15:20 mean?

Baasha king of Israel went up against Judah, and built Ramah, that he might not allow anyone to go out or come in to Asa king of Judah.

Then Asa took all the silver and the gold that was left in the treasures of Yahweh’s house, and the treasures of the king’s house, and delivered it into the hand of his servants. Then King Asa sent them to Ben Hadad, the son of Tabrimmon, the son of Hezion, king of Syria, who lived at Damascus, saying,

“There is a treaty between me and you, between my father and your father. Behold, I have sent to you a present of silver and gold. Go, break your treaty with Baasha king of Israel, that he may depart from me.”

When Baasha heard of it, he stopped building Ramah, and lived in Tirzah.

Then king Asa made a proclamation to all Judah. No one was exempted. They carried away the stones of Ramah, and its timber, with which Baasha had built; and king Asa used it to build Geba of Benjamin, and Mizpah.

Now the rest of all the acts of Asa, and all his might, and all that he did, and the cities which he built, aren’t they written in the book of the chronicles of the kings of Judah? But in the time of his old age he was diseased in his feet.