L'OM's 100% start to the Ligue 1 season was unceremoniously ended on Sunday with a convincing loss at the Stade du Hainaut.
"We have to look forward without forgetting what has happened in our first seven games of the season. Nothing worked today," said Baup.
"We're going to talk things over, and work. We mustn't get too bogged down in a heavy defeat like this one."
Marseille take on Greek side AEL Limassol in the Europa League on Thursday before the visit of second-placed Paris Saint-Germain in the league three days later.