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Multiple @relations between models throw errors

See original GitHub issue

Bug description

When you try to link 2 or more relations in UserPermission model to the User model its not working and error pop up.

 ERROR  Oops, an unexpected error occured!
error: Error validating model "User": Automatic related field generation would cause a naming conflict. Please add an explicit opposite relation field.
  -->  schema.prisma:28
   | 
27 |     updated                 User[]              @relation("ClientUpdatedByUser")
28 |     updatedUserPermission   User[]              @relation("UserPermissionUpdatedByUser")
   | 
error: Error validating model "UserPermission": Automatic related field generation would cause a naming conflict. Please add an explicit opposite relation field.
  -->  schema.prisma:41
   | 
40 |     updatedAt       DateTime        @updatedAt
41 |     createdBy       User?           @relation("UserPermissionCreatedByUser")
   | 
error: Error validating model "UserPermission": Automatic related field generation would cause a naming conflict. Please add an explicit opposite relation field.
  -->  schema.prisma:42
   | 
41 |     createdBy       User?           @relation("UserPermissionCreatedByUser")

How to reproduce

Setup a clean prisma2@2.0.0-preview024 standard env
Run prisma2 migrate save --experimental

Expected behavior

Multiple 2 or more (3, 4, 5,…) relations between 2 models should work, because as shown in the example sometimes its needed. Otherwise the createdBy / updatedBy columns getting Int or String data to save, and this is not prisma2 like.

Prisma information

Failing:

datasource mysql {
    provider = "mysql"
    url      = "mysql://user:password@localhost:3307/prisma"
}

generator client {
    provider = "prisma-client-js"
  }

model User {
    id                      Int                 @id @default(autoincrement())
    email                   String              @unique
    password                String
    firstname               String
    lastname                String
    userPermissions         UserPermission[]    @relation("UserPermissionLink")
    isBlocked               Boolean             @default(false)
    blockedReason           String?
    blockedAt               DateTime?
    createdAt               DateTime            @default(now())
    updatedAt               DateTime            @updatedAt
    createdBy               User?               @relation("ClientCreatedByUser")
    updatedBy               User?               @relation("ClientUpdatedByUser")
    created                 User[]              @relation("ClientCreatedByUser")
    createdUserPermission   User[]              @relation("UserPermissionCreatedByUser")
    updated                 User[]              @relation("ClientUpdatedByUser")
    updatedUserPermission   User[]              @relation("UserPermissionUpdatedByUser")
}

model UserPermission {
    id              Int             @id @default(autoincrement())
    client          Client
    user            User[]          @relation("UserPermissionLink")
    isBlocked       Boolean
    createdAt       DateTime        @default(now())
    updatedAt       DateTime        @updatedAt
    createdBy       User?           @relation("UserPermissionCreatedByUser")
    updatedBy       User?           @relation("UserPermissionUpdatedByUser")
}

Working, but without the second and third relation in UserPermission model createdBy / updatedBy User?

datasource mysql {
    provider = "mysql"
    url      = "mysql://user:password@localhost:3307/prisma"
}

generator client {
    provider = "prisma-client-js"
  }

model User {
    id                      Int                 @id @default(autoincrement())
    email                   String              @unique
    password                String
    firstname               String
    lastname                String
    userPermissions         UserPermission[]    
    isBlocked               Boolean             @default(false)
    blockedReason           String?
    blockedAt               DateTime?
    createdAt               DateTime            @default(now())
    updatedAt               DateTime            @updatedAt
    createdBy               User?               @relation("ClientCreatedByUser")
    updatedBy               User?               @relation("ClientUpdatedByUser")
    created                 User[]              @relation("ClientCreatedByUser")
    updated                 User[]              @relation("ClientUpdatedByUser")
}

model UserPermission {
    id              Int             @id @default(autoincrement())
    client          Client
    user            User[]          
    isBlocked       Boolean
    createdAt       DateTime        @default(now())
    updatedAt       DateTime        @updatedAt
    createdBy       Int?           
    updatedBy       Int?          
}