JWT is_unlinked === true for broadcaster?

Hi, I am getting is_unlinked === true for a broadcaster? Is that even possible?

{
  exp: 1612723574,
  opaque_user_id: 'U439785098',
  user_id: '439785098',
  channel_id: '439785098',
  role: 'broadcaster',
  is_unlinked: true,
}

This is the JWT logged in my server