Comment 3 for bug 1598905

In the case of a reserved name, the returned URL allows the user to continue with the registration, with a message that promptly explains what's about to happen:

In the case of an already registered name, the returned URL would let the user to register the alternate suggested name, while the message explains that the name is already taken with a link to the dispute name form:

The reason behind this is to keep devs unblocked by giving them choices how to follow up. If what's intended is that the already registered name error returns the dispute claim URL as the `register_name_url` it can be done, just confirm that's the case I'll prepare a fix for it.