I get the error above when trying to create something with connected entities, like this:

mutation {
  createAttachment(data:{
    name: "teste",
    description:"desc",
    type: ARTICLE,
    kind:WEB,
    imageUrl:"<http://www.google.com>",
    url:"<http://www.google.com>"
    organizations:{
      connect: [{
        id: "cjgsibg858lms0b06p4a6lgj4"
      }]
    }
  }) {
    id
    name
  }
}

@rafaelcorreiapoli, is it like this error: https://github.com/graphcool/prisma/issues/2351?