MetaHumans 5.6.0 - import versus migrate?

Hi all,

Sometimes when I try to add a MetaHuman preset from the built-in Bridge in 5.6.0 it prompts me to either IMPORT, MIGRATE, or IMPORT AND MIGRATE.

I wish that popup linked to an explanation - because I can’t figure out what that means. In this context, where would it be “migrating” from??

Does anyone know?

toby