Issue 19 of Star Wars: Build the Millennium Falcon is the nineteenth installment of the magazine series, Star Wars: Build the Millennium Falcon. This particular issue contains components for the Millennium Falcon model, specifically a section of the main hold wall and elements of the lower hull.
According to Star Wars: Build the Millennium Falcon 19, the initial use of BTL-B Y-wing starfighter/bombers occurred during the Battle of the Kaliida Nebula. A more up-to-date source, Star Wars: Timelines, indicates that the events depicted in Age of Republic - Anakin Skywalker 1 precede that battle. Given the presence of BTL-B Y-wings in Age of Republic - Anakin Skywalker 1, the information in Build the Millennium Falcon 19 is therefore inaccurate.