PHP GCM错误消息MismatchSenderId

{
  "multicast_id":4630467710672911593,"success":0,"failure":1,"canonical_ids":0,"results":[{
      "error":"MismatchSenderId"
  }]
}

以下是代码.任何帮助将非常感激.提前致谢.

public function gcmPush() 
{
    $regId = "APA91bHFcgOssQZEqtdUk3EC1ojwC5-LVG3NPV2bMqKyC9rPymR6StmAbz-N7Ss8fnvruZhWWNrR3lmBqpjQItlu00AKHPbltBclUJF-EfC5qG4CF2xiuYYC0NCf8u5rbiYFk8ARhIT4lY2AEPWzGpl1OtTvQEC0gA"; 
    $registatoin_ids = array($regId); 
    $message = array("msg" => 12345); 

    $this->send_notification($registatoin_ids,$message);
}

public function send_notification($registatoin_ids,$message) 
{
  // Set POST variables
  $url = 'https://android.googleapis.com/gcm/send';         
  define('GOOGLE_API_KEY','AIzaSyBavsIgQKo1Nf9wKZ5o_fGvE_6MI52LFR0');
  $fields = array(
    'registration_ids' => $registatoin_ids,'data' => $message,);
  $headers = array(
   'Authorization: key=' . GOOGLE_API_KEY,'Content-Type: application/json'
  );

  // Open connection
  $ch = curl_init();

  // Set the url,number of POST vars,POST data
  curl_setopt($ch,CURLOPT_URL,$url);
  curl_setopt($ch,CURLOPT_POST,true);
  curl_setopt($ch,CURLOPT_HTTPHEADER,$headers);
  curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);

  // Disabling SSL Certificate support temporarly
  curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
  curl_setopt($ch,CURLOPT_POSTFIELDS,json_encode($fields));

  // Execute post
  $result = curl_exec($ch)
  if ($result === FALSE) {
      die('Curl failed: ' . curl_error($ch));
  }

  // Close connection
  curl_close($ch);
  echo $result;
}