错误：字段createdAt：在任何模式中都找不到类型DateTime

Question

我在graphql / prisma上有我的应用程序的后端，我需要创建一个字段-createdAt：DateTime！ datamodal.prisma中的@createdAtin用于在服务器上继续创建日期。根据官方文件-https://www.prisma.io/docs/1.34/datamodel-and-migrations/datamodel-MYSQL-knul/。但是我无法启动服务器，因为有错误：字段createdAt：在任何模式中都找不到类型DateTime。有人可以解释我在做什么吗？

datamodel.prisma

type Channel {
  id: ID! @id
  createdAt: DateTime! @createdAt
  title: String!
  cover: String!
  stars: Int
  creator: User! @relation(name: "ChannelToUser", onDelete: SET_NULL)
  topics: [Topic!]! @relation(name: "TopicToChannel", onDelete: CASCADE)
}

type Message {
  id: ID! @id
  text: String!
  createdAt: DateTime! @createdAt
  creator: User! @relation(name: "MessageToUser", onDelete: SET_NULL)
  topic: Topic! @relation(name: "MessageToTopic", onDelete: SET_NULL)
}

type Topic {
  id: ID! @id
  createdAt: DateTime! @createdAt
  title: String!
  stars: Int
  avatar: String!
  creator: User! @relation(name: "TopicToUser", onDelete: SET_NULL)
  channel: Channel! @relation(name: "TopicToChannel", onDelete: SET_NULL)
  messages: [Message!]! @relation(name: "MessageToTopic", onDelete: CASCADE)
}


type RefreshToken {
  id: ID! @id
  token: String!
  owner: User! @relation(name: "RefreshTokenToUser", onDelete: SET_NULL)  
}

type User {
  id: ID! @id
  createdAt: DateTime! @createdAt
  name: String
  email: String
  stars: Int
  phone: String! @unique
  cover: String! 
  avatar: String!
  channels: [Channel!]! @relation(name: "ChannelToUser", onDelete: CASCADE)
  topics: [Topic!]! @relation(name: "TopicToUser", onDelete: CASCADE)
  messages: [Message!]! @relation(name: "MessageToUser", onDelete: CASCADE)
  refreshTokens: [RefreshToken!]! @relation(name: "RefreshTokenToUser", onDelete: CASCADE) 
}