Unable to sell or craft Hound Blueprint

[ReReminded]

Was cleaning my inventory for hounds and their weapons, when I realised I couldn't sell or craft one of the blueprints that drops from the sisters. 

 

Video mp4 link: https://i.gyazo.com/0af4c5dd8d42ce0bcd1a29661b1e38a3.mp4

[Hobie-wan]

Hmm, you build parts and then assemble them like moas in Fortuna. Granted I just leveled up the complete ones that dropped from sisters instead of making my own, but seems like that should be saying it is whatever specific part it is, not just "hound".