Cannot verify roblox account to discord

Back when I played MH, I played it on an alternate account (testAN1) and verified it to my discord account (roblox8192#7968) because the alternate account had higher stats than my main account did. Now that I play Vesteria and I don’t play MH anymore, I want to verify my main account (roblox8192) which I use when playing Vesteria. However, the game doesn’t let me do this, saying “Invalid verification code.” I don’t have enough robux on my alt to buy access, so I can’t just use that account with Vesteria. I do not want to have to switch discord accounts just to access #vesterians either. Can this be fixed?