Specify the PK for the unit data migration
Specify the PK for the unit data migration

This is a bit more robust as there are some 'special' PKs that are hard coded
in the application

rolandgeider/wger,DeveloperMal/wger,DeveloperMal/wger,wger-project/wger,petervanderdoes/wger,wger-project/wger,kjagoo/wger_stark,petervanderdoes/wger,rolandgeider/wger,kjagoo/wger_stark,petervanderdoes/wger,petervanderdoes/wger,DeveloperMal/wger,wger-project/wger,kjagoo/wger_stark,wger-project/wger,rolandgeider/wger,rolandgeider/wger,DeveloperMal/wger,kjagoo/wger_stark