title: feature_names must be unique - Xgboost
body: <p>I am running the xgboost model for a very sparse matrix. </p>
  
  <p>I am getting this error. ValueError: feature_names must be unique</p>
  
  <p>How can I deal with this? </p>
  
  <p>This is my code. </p>
  
  <pre><code>  yprob = bst.predict(xgb.DMatrix(test_df))[:,1]
  </code></pre>