BeeWiki.dev is a copy of steem.center as of maybe a week ago, so any accounts and articles created at least a week ago or older, will already exist on BeeWiki.dev
Since it was copied over, to avoid people having to re-register, and manually copy entire articles which just need rebranded for Hive, there's still a lot of references to "STEEM", "SBD" and "Steemit" etc. that need corrected.
If you didn't already have an old https://www.steem.center account then you'd need to re-register at https://www.beewiki.dev