is one piece episode 121 filler?

Koza is shot by Baroque Works agents that have infiltrated the Royal Guards and as he collapses, he tries to tell the Rebel Army not to fight. The Royal Guards confront the solider that shot Koza but as Koza once again tries to talk to the Rebel Army, a sandstorm blows through the palace obscuring the battlefield and allowing Baroque Works agents that have infiltrated both sides to fire more shots towards the Rebel Army and Royal Guard, triggering a clash between them.

Vivi and Koza try to stop the fighting, but their voices are drowned out by the fighting occurring in the Palace Square.