aws route53 Tried to create resource record set type=\'CNAME\'] but it already exists'

{ [InvalidChangeBatch: Tried to create resource record set [name='demotest3d.test.com.', type='CNAME'] but it already exists]
  message: 'Tried to create resource record set [name=\'demotest3d.test.com.\', type=\'CNAME\'] but it already exists',
  code: 'InvalidChangeBatch',
  time: Wed May 17 2017 13:05:26 GMT+0800 (Malay Peninsula Standard Time),
  requestId: '7684460-3abe-11e7-b5fe-5bc5fdddcbjcxdb52370',
  statusCode: 400,


Solution : Subdomain already exists. Check in route53.