Hi @ostae911 , are you still facing this issue?

It looks like your usage of the timestamp column is correct. It can be used as a primary key on the time series feature table. Is it possible that there are other duplicate columns between the training dataframe and the `example_corona_features` table?

You could try creating the training set first and then pass it to `automl.forecast` without the list of feature lookups. You also may be able to rename features if there are indeed duplicate column names. 

I hope that helps, but feel free to ask any follow up questions. If this reply does resolve the issue, please click the "Accept Solution" button to let us know!

-James