iPhone 5 registration tells me: "iPhone 5s (Do not use)"

Hi.

I just noticed that my new iPhone 5s was not listed on my "registered Apple Products"-Page.

I entered the serialnumber to register it. But than it strangely named the device: "iPhone 5s (Do not use)".

Why? Am I not supposed to register an iPhone 5s?

There was also no iPhone-Image-Icon in front of the name after the registration. Insteas it just shows an Apple Logo.