Blueprint migration

Hi.

So i have been using some 3rd party blueprints that I have acquired or have bought from the Marketplace.
I will use a spline tool as an example, but it happens on all blueprints on migration.

So I select the folder that contains
Everytime I try to migrate them to my main project,
everything is migrated but the links to static meshes are always broken, as are materials to the static meshes
and so on.

Is this normal?

Or is there something I am doing wrong?

Thanks for any help