Unexpected Error updating GP 2015 R2

I received the following error updating a client to the latest build of GP 2015 R2 (KB3080334):

“An unexpected error was encountered trying to register the trigger: AFTER – Credit_Check of form SOP_Entry.  Error 2.  This trigger will be disabled.

Indications were this was the result of an add-in product in GP.  In the process of elimination I found that my version (2015b10) of Ethotech Commission Plan was the culprit.  I downloaded the latest update (2015b102) to Commission Plan and the error went away.