Board Thread:Support Requests - Getting Technical/@comment-1845428-20190331223037/@comment-5811199-20190331234056

I believe your own user rights won't get migrated to your new username, but any user rights you change will be migrated.

So like - if someone else changed your rights a while back, it'll stay as your old username. Any new ones will be on your new username though. I don't think this can be changed, unfortunately.