Term Store Errors during Migration from 2010 to 2016

Migration of terms from the term store is successful for the most part, however I receive the following error which fails to complete certain term sets and then stops processing the rest in that term group.

Error Adding Term='Planning Page' [Id=<GUID>], tsi.Name = ...

Detail = "There is already a term with the same default label and parent term. "

How can I get past these errors?