is one piece episode 869 filler?

Luffy and Katakuri continue fighting. Each tries to gain an advantage as they work to overcome the other's attacks, and Luffy, with his Observation Haki at a level higher than ever before, is ultimately able to foresee Katakuri's attacks as well and perfectly match the Sweet Commander's attacks.

Katakuri manages to get the upper hand briefly by using Kuri Mochi to rapidly shoot mochi spikes, but as the two clash again, Luffy remembers his training on Rusukaina.