title: Telegram Bots sendPhoto Error
body: <p>I can use <code>sendPhoto</code> method in telegram bots <code>API</code> and it sends photos successfully, but usually the photos that are submitted to the bot beforehand. However when I try to send that photos with another bot (using the same <code>file_id</code>) to a user, telegram responds :</p>
  
  <pre><code>{"ok":false,"error_code":400,"description":"Error: Wrong file identifier specified"}
  </code></pre>
  
  <p>this is the <code>sendPhoto</code> request :</p>
  
  <pre><code>https://api.telegram.org/bot1111111:AAG2kyktWYTwHEVL156YYJb-yiFvd4/sendPhoto?chat_id=22222&amp;photo=AgADBAADeagxGzgMngUmjMxAoGC-v5SAcjAABHd8t3Qaw6LuQpsAAg1
  </code></pre>
  
  <p>This request works fine with one Bot, but not for the other Bot!</p>
  
  <p>Does telegram restrict sending <code>file_id</code>s? so that the bots that are previously received that <code>file_id</code>s could only send them?!</p>