We are planning a 2 phased migration from SharePoint 2010 to 2013. In phase 1 we are migrating all content from 2010 to 2013, to test everything is functioning and fix any issues. In phase 2 we want to update the 2013 content with the latest version of content from SharePoint 2010. What I want to know is, when the 2010 Nintex Workflow Content Database is migrated for a second time to 2013, will this cause any issues such as duplication..? Would it be best to wiped the data from the Nintex Workflow Content Database in 2013 and then migrate the 2010 database?