is one piece episode 837 filler?

63 years ago on Elbaph, Jorul brought his sword down on Linlin, only for her to break it with her arm and flip the giant over, greatly injuring him. As other giants went to try subduing Linlin, Carmel told them to get the semla they had stored, and she went up to the flames engulfing the Western Village.

Using her Devil Fruit powers, Carmel gave life to the flames and condensed them into a small sun, which she named Pandora. The giants stared in awe at Carmel's seeming miracle, and Linlin went to sleep after fulfilling her semla craving.