There’s a very fine line between progress and overtraining. According to research, the deadlift is a very intense movement and does a great deal to the CNS. One thing I learned very quickly (not as quickly as I should’ve but very quickly for someone like me) is that compound movements like the deadlift, bench, squat (heck even isolation movements) tend to tax the body a great deal. If we’re doing these movements 3-5 days out of the week we also don’t give our body’s very much time to recover, which can be considered to be counterproductive with any of our goals (unless your only goal is to go to the gym). I’m guessing that isn’t you. It’s suggested that you/we do movements like the deadlift at most twice a week. For more information on this, here’s an article from powerlifting.website that talks about this in more depth.