The 2015 Year End update isn’t perfect. Here is how you can deal with Failure on the UPR00905 (Payroll Master Employee ACA) table: The conversion process encountered an error and the temporary table did not get removed.
Failure on the UPR00905 (Payroll Master Employee ACA) table: The conversion process encountered an error and the temporary table did not get removed. – Microsoft Dynamics GP Community
Payroll & HRSQL & DataYear-End & 1099
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.