Hy there i decided to share something even is not a big deal , but i already shared on sunrise .
Put the following line on requestexenchantitemattribute.class
Elementals oldElement = item.getElemental(elementToAdd);
int elementValue = oldElement == null ? 0 : oldElement.getValue();
int limit = getLimit(item, stoneId);
int powerToAdd = getPowerToAdd(stoneId, elementValue, item);
// if ((item.isWeapon() && (oldElement != null) && (oldElement.getElement() != elementToAdd) && (oldElement.getElement() != -2)) || (item.isArmor() &