Cake Console Baking Model displayField?

I’m doing some baking on the console with 1.3 and perhaps I didn’t setup my database correctly because I’ve never seen this message before:

 

A displayField could not be automatically detected would you like to choose one? (y/n)

 

I am then presented with a list of options from the database table I am trying to make my model from.  Is displayField supposed to be the primary key?  Any input would be appreciated, thanks!

 

-John

 

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