First of all: THANKS @SquigglesJP for picking one of my favourites as always. Even if you stop here is a good thing since at least you woke up MoePanda from their hibernation. I hope the releases keep coming so everyone here is happy
It's a flashback @AtomikCactus, this happens after Ch. 34 when Rudeus is reunited wtih his father and the end up fighting. Eris mentions this fact to Cliff (a much younger Cliff BTW)