AWS Cognito不使用我的自定义消息lambda

我已经通过Terraform创建了一个AWS Cognito用户池，如下所示：

resource "aws_cognito_user_pool" "users-base" {
  name     = "users"
  provider = aws.eu-west-1

  auto_verified_attributes   = ["email"]
  username_attributes        = ["email"]

  account_recovery_setting {
    recovery_mechanism {
      name     = "verified_email"
      priority = 1
    }
    recovery_mechanism {
      name     = "verified_phone_number"
      priority = 2
    }
  }

  admin_create_user_config {
    allow_admin_create_user_only = false
  }

  email_configuration {
    email_sending_account = "DEVELOPER"
    from_email_address    = "No-reply <[email protected]>"
    source_arn            = aws_ses_email_identity.no-reply.arn
  }

  lambda_config {
    custom_message = aws_lambda_function.cognito-users-base.arn
  }
}

虽然我希望我的用户收到生成的邮件aws_lambda_function.cognito-users-base（由于以前生成错误，所以配置正确，但他们仍然收到根据生成的邮件verification_message_template.email_message_by_link，我想念什么？

编辑：我还检查了生成的smsMessage少于140个角色，而emailMessage少于20.000个。而且，当我添加属性时，SignUp进程将阻塞，因此lambda会以另一种方式被调用。