Miner and Mining Engineer Traits

The Miner lifepath from the human villager setting grants access to the trait Black Lung, which is restricted to Orc LPs, while the Mining Engineer has the trait Deep Sense, a restricted Dwarf trait. What do I do with those? Keep them as is, strike them, or replace them with some other suitable trait?

Keep 'em! Special present for you! (They’re only restricted for purchasing as general traits, not if they’re required for your LP.)

Aw, you shouldn’t have. Thanks! (Black Lung is the best present.)