What happened to the Cohors Prima Cornoviorum

[Arturus Uriconium]

Does anyone know what happened to the Cohorts Prima Cornoviorum stationed at the Wall? Did Maxinus or Constantine drag them off to their deaths and have there been any graves found in Europe datable to after 383 AD?

I ask because I wonder if they went back to Cornovia, either to Deva or Viriconium to help defend Britannia Prima, or Cornovia.

Thanks!