this is my type

type Post @model {
  # Required system field
  id: ID! @isUnique # read-only (managed by Graphcool)
  # Optional system fields (remove if not needed)
  createdAt: DateTime! # read-only (managed by Graphcool)
  updatedAt: DateTime! # read-only (managed by Graphcool)
  description: String!
  imageUrl: String!
  author: User! @relation(name: "PostOwner")
  comments: [Comment!]! @relation(name: "PostComment")
}

type User @model {
  id: ID! @isUnique
  createdAt: DateTime!
  updatedAt: DateTime!
  email: String!
  posts: [Post!]! @relation(name: "PostOwner")
  comments: [Comment!]! @relation(name: "CommentOwner")
}

type Comment @model {
  id: ID! @isUnique
  createdAt: DateTime!
  updatedAt: DateTime!
  message: String!
  post: Post! @relation(name: "PostComment")
  author: User! @relation(name: "CommentOwner")
}

It's bug in relay compiler that apparently occurs only to graph cool users. It's been months already and no solution :-(

did you try this before https://github.com/facebook/relay/pull/2142

No I haven't @Jang. I saw it has been fixed but has it been already released?