Salon des Artistes Indépendants, Paris, 1909

Modigliani is not in the catalogue Therefore we must assume he was not in this exhibition, but several paintings claim in the exhibition files that thewy were at it, probably its a mistake, but here are referred the ones:
Tokyo Fuji art museum in Japan say his painting of Paul Alexandre was in the exhibition probably a mistake of the museum files:

Legal note on MR: This investigation has not had access to MR’s catalogue raisonné; all research here is based on open sources, publications and exhibitions. By no means has that catalogue been copied at any point.