Issue with Installing Sales Insight in SFDC Sandbox

I'm receiving an error message in both Marketo and my SFDC sandbox.  The error message stated I do not have the lead field “priority” configured  in the lead or contact tables.  This would be true because the Marketo  package didn't create this object  for me. There is also nothing in the documentation ( that states I should be creating new fields in SFDC independent of the fields already created by the install package