Hi and welcome, Sue. If you planted your asparagus roots fairly deep, then it should be not too hard to move the plants that grew from seed, as their roots will surely be closer to the soil surface. I would do that and make yourself a bigger bed of asparagus. You can't have too much!
Soak the area really well with water first, and even try gently spraying off some of the surface soil so you can separate the younger seedling roots from the old ones if they are close together. Try not to tear roots if you can help it, and also try not to disturb the plants you planted as roots.
