Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey guys I need help. Recently i joined a WSG with my hunter without having any pet. The game by itself gave me a new one a copy of the pet i have i stables . The problem is that I cant manage this pet ( feed , learn skills) or
get rid of it. There is no abandon option .Also i cant place it on stables or do any action at all. What should i do ?