Leonard "Boogie" Weinglass (born 1941) is a charismatic American businessman who founded retailer Merry-Go-Round, a chain of restaurants named Boogie’s Diner, and whose early life was portrayed by actor Mickey Rourke in the 1982 classic American film "Diner".
Boogie's Diner primarily serves food.
Since Boogie's Diner is called a "chain of restaurants" in the context rather than a bar or other such establishment, it should be understood that food of some sort is what's mainly served there. The system likely took offense to the term "primarily" being present, not understanding the significance of the building being called a restaurant instead of a bar or other such location that would mostly serve drinks instead.