Board Thread:Support Requests - Getting Started/@comment-44849334-20200520182728/@comment-9605025-20200520201729

For future reference, you should use Special:UserRenameTool to rename an account (unless you have already done so for that account). This will take care of moving all of your contributions and pages for you.

That said, it is too late to do that now. You should place the redirect on the user page for your old account. So it should be placed on User:Sweet13erry. You will probably want to do this on each wiki you have edited on.