We upgraded our Crm 4.0 to Crm 2013 recently and also had some .net functionality developed in CRM so the .net app could be sunseted. In doing so all the historical data from the old app was migrated into CRM. That has proven to be a really bad decision and we need to make the historical data truly history and not tightly linked to current CRM customer records. What are our best options for doing this?
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