Joseph Maurice Ravel (] ; 7 March 1875 – 28 December 1937) was a French composer, pianist and conductor. He is often associated with impressionism along with his elder contemporary Claude Debussy, although both composers rejected the term. In the 1920s and 1930s Ravel was internationally regarded as France's greatest living composer.
Ravel studied with his elder contemporary Debussy in the 1920s and 1930s.
Ravel was not studying with Debussy in the 1920s and 1930s, as he was regarded as the greatest living composer and was already a professional, not the student of the greatest living composer.  I think it confused the system because the dates and facts were present, but it could not apply reasoning skills to determine between master of an art or student. 