Good day Sir/Ma'am

I already use Transform Weapon to my main weapon but when i Transform Weapon to my Sub Weapon it does not work but i have the right materials for Transformation Weapon to my Sub Weapon can you please check it sir. Thank you

Did you change your class? If the sub-weapon is the same from your previous class, there should a pop-up message informing you that it's the same (can't exactly remember). But, what you'd need to buy in this case is the 10M worth awakening/ascension sub-weapon change check in Pearl Shop (I really forgot the correct term, I don't do class changes that much). However, if that did not help, you'd need to contact their support team.