I believe this counts as a forum bug. To Report forum bugs, you might want to create a topic in Forum Help > Forum Bugs. If you can, try moving the topic to this catagory or create a new one there and this one gets locked
Hey, this is not a bug. As mentioned in the error message, you can only occupy one account per email address on the forum-side.
If you are wanting to log in with an account on email X and you get this error, log into previous accounts where you used email X and change the email address + log into the forum to update it away from X. After that, you can log into your intended account with email X.
We understand the limitation is annoying when you’ve forgot all the accounts where you used email X but this is not a bug. We have plans to improve it in the future, but not soon.
It looks like you’re correct, I’ve went through all my accounts under the affected email and I’m encountering the error, but it works fine on other emails. It looks like there could be an account I forgot about that is already linked