Ranker status is getting failed

[poonamsaini17]

Hi ,
I have taken the data which you have provided for training but every time status for the ranker which i am creating is failed .
and error description is :
{"ranker_id":"3b140ax14-rank-2223","name":"ranker1","created":"2016-05-23T11:28:36.026Z","url":"https://gateway.watsonplatform.net/retrieve-and-rank/api/v1/rankers/3b140ax14-rank-2223","status":"Failed","status_description":"Error encountered during training: Training data quality standards not met: invalid header (duplicate feature names). Row 1 of input data."}

Can you please help me why this is coming ?