From the GP team comes some common Error messages when upgrading to Microsoft Dynamics GP 2013 or Microsoft Dynamics GP 2015 – Microsoft Dynamics GP Community
Error messages when upgrading to Microsoft Dynamics GP 2013 or Microsoft Dynamics GP 2015
Install, Upgrade & AdminGP 2015GP 2013
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.