That is — The same city was called by both names.
Related Commentaries of 1 Chronicles 13:6
1 Chronicles 13:6
6 And David went up, and all Israel, to Baalah, that is, to Kirjathjearim, which belonged to Judah, to bring up thence the ark of God the LORD, that dwelleth between the cherubims, whose name is called on it.