As the super-lightweight title contest between Marvin Petit and Samir Kasmi reached the seventh round, there was no way the match could continue due to an eruption of shocking trouble involving supporters and some involved in the fight ringside.
Petit, Kasmi, and their respective teams fled the ring in fear as flying chairs and debris added to the punches and kicks being thrown.
Several people were hurt during the brawl, which is now being investigated by the French authorities.
On top of the bill, super lightweight Franck Petitjean defeated Andrea Scarpa in an EU (European Union) super-lightweight title clash. Mohamed Mimoune scored a unanimous win over Emiliano Rodriguez in the same division.
At super featherweight, Maiva Hamadouche retained the female IBF title with a win over Myriam Dellal.
In two French title bouts, cruiserweight Herve Lofidi shocked Siril Makiadi with a first-round knockout.
Undefeated, Kevin Lele Sadjo took the super-middleweight strap Shamil Ismailov in four.
Victories for Gustave Tamba, Rachid Achoui, and Maxime Devignaud rounded off the card, tainted by the fighting that took place outside the ring.