I don't think there is, but I doubt anyone would really look, or even care, so you shouldn't worry about it. That was over 6-4 years ago anyways
Terraria Community Forums
Ivyss
Best you've really got is asking staff and seeing if they can do it. I will also note that even if they do have a thing to reset all of someone's account activity, I don't think that would include stuff like trophies.
Unit One
We’ve made it so that you can delete your own stuff by yourself. 
Anything that you want to wipe away, you can. There is a delete button under each of your posts. If there’s not, it may be in a locked thread - send me the link and I can remove it for you.
Anything that you want to wipe away, you can. There is a delete button under each of your posts. If there’s not, it may be in a locked thread - send me the link and I can remove it for you.