If you have K2 4.6.9 or later and you installed coldfix 611518, exceptions occur in the K2 Installer log file when upgrading to K2 4.7. 


The coldfix added a function and column to the K2 database. This caused a conflict for the K2 4.7 upgrade scripts, causing the K2 installer to fail.


Contact your regional support for a script to fix the issue before upgrading to K2 4.7.