docs: fix incorrect link to duplicate users

website/docs/docs/user-interface/settings/preferences.md

@@ -52,7 +52,7 @@ Note: Any email address can be added to this field. The owner of the email addre
 
 Allow users to be linked to different identity providers via their email address. When enabled, logins from different identity providers will be considered the same user if they have the same email address.
 
-This setting does not affect existing users that have previously logged in and have a stored identity. To fix this, see the troubleshooting article on [duplicate users](/docs/authentication/main#4-ive-added-an-identity-provider-and-see-duplicate-users).
+This setting does not affect existing users that have previously logged in and have a stored identity. To fix this, see the troubleshooting article on [duplicate users](/docs/authentication/legacy#4-ive-added-an-identity-provider-and-see-duplicate-users).
 
 :::warning
 Do not enable this setting unless you can guarantee the identity providers you use validate the user's email address.