Creating device via api, error user_id

Hello all, im newbie with firezone.

Today im trying to play with API but i cant create more than one device from api to one user_id, error from server is: failed with status 422, response {“errors”:{“user_id”:[“has already been taken”]}}

What’s im doing wrong?

Problem was not in user_id, it was in name or in description, they was same at it was with first try.