IMPORTANT TWEAK: deduplicate returned values

src/model/k2v/item_table.rs

@@ -98,9 +98,11 @@ impl K2VItem {
 		let mut ret = vec![];
 		for (_, ent) in self.items.iter() {
 			for (_, v) in ent.values.iter() {
+				if !ret.contains(&v) {
 					ret.push(v);
 				}
 			}
+		}
 		ret
 	}